Words starting with ” o ” for SAT, GRE, GMAT, CAT skmclasses Bangalore

obdurate – stubbornly persistent in wrongdoing; also; showing unfeeling resistance to tender feelings

chevalier d’industrie A woman who lives by swindling



Obdurate Stubbornly persistent in wrongdoing

Short Story describing the meaning of the word Obdurate is at


obeisance – an attitude of deference or homage; a gesture, such as a curtsy, expressing that attitude

objet d’art – a small decorative or artistic piece; a curio

objurgate – to scold or rebuke sharply; berate

berate – Censure severely or angrily

objurgated Express strong disapproval of Censure severely


oblation – the act of offering something to a deity; also, a charitable offering or gift.

obloquy (also here) – strong abusive public condemnation; the disgrace brought about by it

obnubilate – to becloud; to obscure

obol – a coin, of small amount, in ancient Greece and modern Greece until the euro

obreptitious – making false statement to obtain something

Obreptitious woman making false statement to obtain something


obscurant – 1. obscuring the vision (adj: tending to do so ) [contrast obscurantist 1)]. 2. one opposing new ideas or social or political reform (adj: so opposed)

obscurantist – 1. deliberately written to be obscure to the understanding (adj: so written) [contrast obscurant 1)]. 2. sense 2 of obscurant, above

obsequious – servilely obedient or attentive; fawning [One source say to think of ‘kiss-ass’.]

obsidian – eponym: a dark volcanic glass, formed by the rapid cooling of lava

obstipate – to constipate severely

obstreperous – 1. noisily and stubbornly defiant 2. aggressively boisterous

obtrude – (of a thought or a person) to thrust itself (or himself), unwelcome, upon a person’s company or attention.

oceanography – the study of bodies of salt water, including their biology and geology; contrast limnology

oceanology – (formerly synonymous with oceanography) the technology and economics concerned with human use of the ocean.”

oche – the line behind which darts players stand when throwing

Ockham’s razor; Occam’s razor – eponym: general principle to prefer the simpler of two competing explanations

October surprise – an unexpected newsworthy act, or revelation, that is deliberately timed to hit the news just before an election so as to maximize its impact on the election

octoroon – offspring of a quadroon and a white [one-eighth black]. see mulatto

octothorpe – the # sign, as on the telephone

oculus – a round window, usually a small one (Latin oculus = eye)

oda – the dormitory of the sultan’s seraglio

odds and sods – (UK; informal) miscellaneous items

odious – hateful; unequivocally detestable

Odious hateful unequivocally detestable


odium – general or widespread hatred or disgust

Odium general widespread hatred towards woman

Abomination – A person who is loathsome or disgusting. Hate coupled with disgust. An action that is vicious or vile; an action that arouses disgust or abhorrence. “his treatment of the children is an abomination”

odium – State of disgrace resulting from detestable behaviour. Hate coupled with disgust.

odyssey – eponym: a long voyage (physical or spiritual) marked by many changes of fortune

oedipal – eponym: of the Oedipus complex: a boy’s unconscious sexual desire for his mother

oersted – eponym: the unit in which magnetic-field intensity is measured

oeuvre – a writer’s or artist’s body of work

OG – brewing: original gravity. The specific gravity of wort before fermentation and thus a measure of the probable alcoholic content of the final drink

oinomancy – divination by the lees of wine [dictionary at mancy lists 54 form of divination]

olamic ­– eternal; infinite [from the Hebrew olam, “world”]

oleaginous – greasy, oily; hence offensively ingratiating

olecranon – “The large process on the upper end of the ulna that projects behind the elbow joint and forms the point of the elbow.”

oligarchy – a state governed by a small group of people; also, the group

olio – 1. a highly seasoned stew of meat, vegetables, and chickpeas 2. a miscellaneous mixture

olisbos – a dildo [from Greek ‘to slip, glide’]

olivander (more commonly, olivaster) – olive-colored (particularly as to complexion); with an easily-tanned or Mediterranean skin

Oliver’s skull (etymology) – a chamber pot

olla-podrida – see olio

omadhaun – a fool, an idiot, a mentally backward person [Irish]

omasum – one of four parts of a cow’s stomach; see abomasum

omphalos – the navel; also, a central part or focal point

omphaloskepsis – meditation while gazing at one’s navel

omphelomancy – divination by the navel [dictionary at mancy lists 54 form of divination]

onanism – eponym: masturbation (also: coitus interruptus; an interesting pairing of meanings!)

onchyomancy – divination by the nails [dictionary at mancy lists 54 form of divination]

Toe nails nailpolish 2

oneiromancy – divination by dreams [dictionary at mancy lists 54 form of divination]

onomancy – divination by names [dictionary at mancy lists 54 form of divination]

onomasticon – 1. a list or collection of proper names 2. a list or collection of specialized terms, as those used in a particular field or subject area

onomastics – the study of names

onomatopoeia – formation of words in imitation of sounds they relate to, such as buzz or murmur. (adj. onomatopoeic or onomatopoetic)

oolong – a dark Chinese tea that has been partially fermented before drying

operculum – zoology: a lid or cover; also: the lid closing the aperture of various species of shells, such as the common whelk

ophidian – like a snake

ophiophagous – feeding on snakes

opitulation – act of helping

opposition – c.1395, as an astrological term for two heavenly bodies exactly across from one another in the sky. The meaning “contrast, antagonism” first attested 1581; sense of “political party opposed to the one in power” is from 1704.

optimist – A person disposed to take a favourable view of things

Adventure by optimist women

orangeman – eponym: a Protestant Irishman

orangutan (etymology) – from Malay for “man of the forest”. It may be that the Europeans misunderstood the term, and that the Javanese used it refer to savage human tribes living in the forests.

ordnance – 1. mounted guns; cannon 2. munitions; military supplies

orgulous – prideful; haughty

Orgulous prideful Haughty woman


orifice – a hole opening into a bodily cavity

ornithomancy – divination by birds [dictionary at mancy lists 54 form of divination]

orographic – relating to mountains; esp., associated with or induced by mountains: orographic rainfall

orotund – 1. (of the voice) resonant and impressive. 2. (of writing or style) pompous

Orphean – eponym: hauntingly beautiful or enchanting (literary)

orrery – eponym: a clockwork model of the solar system

ort – a scrap or morsel of food left at a meal

orthodoxy – beliefs, ideas or activities considered traditional, normal and acceptable by most people

orthoepy – correct pronunciation of words (The antonym is cacoepy – incorrect pronunciation)

orthography – the conventional spelling system of a language

Orwellian – eponym: evoking Orwell’s picture of a future totalitarian state

Oscar – (eponym, and tradename) each of the annual movie awards of the Academy of Motion Picture Arts and Sciences

oscine – like a songbird

Oscitant – Showing lack of attention or boredom


Short Story describing the meaning of the word Oscitant is at


osculate – to kiss; also, to touch or contact (as geometric figures)

ossify (trans. or intrans.) – to make into bone; hence, to cease developing, and become rigidly set in conventional patterns

ossuary – a place for bones of the dead

ostler – see hostler

ostracize (also here) – to expel from a community or group; to cast out from social, political, or private favor

Othello – eponym: trade-name for a certain board game (generically, reversi), after the sudden reversals of fortune

otiose – 1. ineffective; futile 2. lazy 3. useless; serving no useful purpose

otiose – Serving no useful purpose; having no excuse for being. “otiose lines in a play”. Producing no result or effect. “an otiose undertaking”.

Short Story describing the meaning of the word Otiose is at


oubliette – a dungeon reached only by a trap door it its ceiling

outré – conspicuously unconventional, eccentric, or bizarre [pronounce the vowel sounds and accent as in ‘today’]

overpainting (in art conservation) – when the restorer gets carried away and paints on top of original paint passages, instead of just where a piece of paint is missing

overstory – the tallest trees in a forest, also called the canopy

ovine – like a sheep

owlish – 1. like an owl, especially in seeming solemn and wise 2. (of glasses or eyes) resembling the large round eyes of an owl

oxter – the armpit (oxter pipes – bagpipes)

oxymoron – a contradiction in terms [The term is itself an oxymoron: oxy- “sharp” + moron, “stupid”]

oxythymous – quick-tempered; easily riled

Oxythymous quick-tempered easily riled women


oytser – from Yiddish: 1. a treasure, or 2. (ironic) far from a treasure. My child is an angel, an oytser to me. Her child? That brat. God save me from such an oytser!

Ozymandian – eponym: huge, grandiose, but ultimately devoid of meaning

oakum old ropes untwisted for caulking the seams of ships
oakus wallet; pocket billfold
oast kiln to dry hops or malt
obambulate to wander about
obdormition numbness in a limb caused by pressure on a nerve

obduracy stubbornness; persistence

Obduracy stubbornness by a woman

obedible docile; capable of obedience
obedientiary someone subject to obedience
obeism practice of West African magic
obeliscolychny lighthouse
obelisk dagger sign used as a critical mark or note
obelize to condemn as spurious, doubtful, or corrupt
obelus division sign; mark used to indicate unacceptable passages
obeophone mechanical keyboard instrument used to imitate woodwind instruments
obequitate to ride about
obfuscate to obscure; to darken; to confuse

obganiate – to irritate someone by constantly repeating oneself

Obganiate When a woman irritates someone by constantly repeating herself

obi broad sash worn with a kimono
obit religious office for a dead person
obiter in passing; incidentally
obitual of, like or pertaining to obituaries
objectivism doctrine that all reality is objective
objicient objector
objuration the act of binding by oath; a solemn charge
objurgate to chide; to scold; to rebuke
oblate flattened at opposite sides or poles
oblate layman living in a religious community under modified rule
oblation act of offering; a sacrifice; anything offered in worship
oblectation enjoyment; pleasure
obliquation obliqueness
oblivescence forgetfulness; forgetting
oblocutor one who denies or disputes
obloquy censure; calumny; slander; disgrace
obluctation resistance; opposition

Obmutescent speechless; persistently silent

Obmutescent speechless persistently silent

obnixely earnestly; strenuously
obnubilate to becloud; to obscure
obolary extremely poor
obreption seeking to obtain a gift by false premises
obrogate to alter the law by passing a new law
obrotund round but flattened on top and bottom
obscurantism policy of withholding knowledge from the public
obsecrate to beseech; to implore
obsequent flowing in opposite direction to original slope of land
obsequies funeral
obsequious servilely ingratiating; fawning
observationalism belief that all knowledge is based on observation
obsidional of, like or pertaining to a siege
obsign to seal or confirm
obsolagnium waning sexual desire due to age
obstetrics study of midwifery
obstreperous noisy; unruly
obstriction obligation
obtend to put forward or allege
obtenebrate to cast a shadow over
obtest to call to witness; to adjure; to protest; to beseech
obtruncate to cut or lop off the head of
obtund to blunt or dull; to deaden
obtundent dulling
obturate to stop up; to seal up
obumbrate to overshadow
obvallate walled in; sealed up
obvention any incidental occurrence or advantage
obvert to turn; to alter
obvolute overlapping; twisted
obvolvent enwrapping; curved downward or inward
ocarina egg-shaped flute-like wind instrument
occamy alloy imitating gold or silver
occasionalism belief that interactions between mind and body are intermediated by God
occipital of, like or pertaining to the back of the head
occlusion closing of an opening, passage or cavity
occultation concealing of one heavenly body by another
ocellated eyelike and ringed; having an eyelike spot or spots
ocellus small eye or eye-like coloured spot
ochlesis sickness resulting from overcrowded living conditions

Ochlocracy government by mobs

Ochlocracy Government by mobs

ochlophobia fear of crowds
ochre yellowish or yellow-brown colour
ochroleucous yellowish white
ocracy government
ocreate wearing boots or leggings
octactinal having eight rays or points
octad set of eight things
octamerous having parts in eights
octan recurring every eight days
octapla multi-lingual book in eight texts
octarchy government by eight people
octarius pint
octastich poem of eight lines
octingentenary eight hundredth anniversary of an event
octodont degu
octonary of, like or pertaining to or consisting of eight things; grouped in eights
octonocular having eight eyes
octothorp hash; pound sign
octroi trading privilege, monopoly or concession granted to a town
oculate having eyes
oculiform shaped like an eye
oculus round window, especially over main door in church
od mild oath
odalisque female slave in a harem
odditorium place for displaying oddities
odeum a usually small theatre or concert hall
odible worthy of hatred
odium hatred; offensiveness; blame
odograph odometer; instrument for measuring distance travelled
odology science of the hypothetical mystical force of od
odontalgia toothache
odonterism chattering of the teeth
odontist dentist
odontogeny origin and development of teeth
odontograph instrument for obtaining curves for gear-teeth
odontography scientific description of teeth
odontoid tooth-like
odontology study of teeth
odontoloxia irregularity of the teeth
odontomancy divination using teeth
odophone scale of odours
odoriferous emitting a usually pleasant smell
odorimetry measurement of strength and persistence of odours
odorivector substance producing an odour
oecist founder of a colony
oecodomic of, like or pertaining to architecture
oeillade an ogle; a glance or wink
oenology study of wines
oenomancy divination by studying appearance of wine
oenomania obsession or craze for wine
oenometer instrument for measuring alcoholic strength of wine
oenophile one who is fond of or loves wine
oenophobia fear or hatred of wine
oenopoetic of, like or pertaining to wine-making
oersted unit of magnetic field strength
oestrogenic producing female sex hormones
officialism excessive devotion to routine or position
officinal belonging to or used in a shop
officious volunteering one’s services too eagerly
ogdoad set of eight
ogee S-shaped
ogive graph representing cumulative frequency
ogonek mark placed under Slavic consonant to indicate nasalization
ohmmeter instrument for measuring electrical resistance
oikology science of housekeeping

Oikonisus desire to start a family

Oikonisus desire to start a family

oinomancy divination using wine
okapi short-necked giraffe
olamic of or belonging to a vast period or eon
oleaginous oily, fawning or sycophantic
olecranon funny bone
oleic of, like or pertaining to or derived from oil
oleiferous producing oil
olent having a smell; fragrant
oleograph print in oil-colours to imitate an oil painting
oleography lithography employed to resemble oil painting
oleometer instrument for measuring amount of oil in a substance
oleraceous of the nature of a pot-herb; for kitchen use; edible
olericulture growing of herbs and vegetables
olfactible able to be smelled
olfactology study of the sense of smell
olfactometer instrument measuring intensity of odour of a substance
olid rank-smelling
oligarchy government by the few
oligochrome work of art using few colours
oligodynamic of, like or pertaining to the effect of small quantities
oligogenics birth control
oligomania obsession with a few thoughts or ideas
oligophrenia feeble-mindedness
oligopoly market situation of few sellers of a service
oligopsony market situation of few buyers of a service
oligosyllable word of few syllables
olim formerly
olio miscellany; potpourri
olitory of, like or pertaining to kitchen vegetables
olivaceous olive-coloured
olivary olive-shaped
olivaster having an olive complexion
olivet artificial pearl
olivetta container used to hold olives
oliviform shaped like an olive
ollamh learned man in ancient Ireland
olm blind aquatic cave-dwelling European salamander
ololygmancy fortune-telling by the howling of dogs
ombré shadowy; shaded; dusky
ombrology study of rain
ombrometer rain-gauge
ombrophilous tolerant of large amounts of rainfall
ombrophobia fear of rain
omegoid shaped like a horseshoe or omega
ommateum compound eye
omneity state of being all; allness
omniana about all sorts of things
omnicompetent legally competent in all matters
omnifarious of all kinds
omniferous bearing everything
omnify to make large or universal
omnigatherum miscellaneous assemblage or collection
omnigenous of all kinds
omniloquent speaking on all subjects
omniparity general equality
omnism belief in all religions
omophagy eating of raw flesh as a ritual observance
omoplatoscopy divination by observing cracks in burning scapulae
omphalism centralization in government
omphaloid navel-like
omphalomancy divination from the knots in the umbilical cord
omphalopsychite one who meditates by gazing at the navel
omphalos the navel; a boss; a centre
omphaloskepsis navel-gazing
onager military engine for throwing great stones
onager Asiatic wild ass
onanism masturbation; self-gratification
oncogenesis producing cancerous tumours
oncology study of tumours
oncometer instrument measuring change in size of internal organs
oncosimeter instrument measuring variations in density of molten metal
oncostman mine worker paid by the day
ondograph instrument measuring change in wave formations of electricity
ondoyant wavy
oneiric of, like or pertaining to dreams
oneirocriticism dream interpretation
oneirodynia nightmare
oneirology study of dreams
oneiromancy divination by dreams
one-step ballroom dance marked by quick walking steps
oniomania mania for making purchases
oniscoid like a woodlouse
onocrotal old term for the pelican

onolatry worship of asses or donkeys


onomamania mania for names
onomancy divination using a donkey or ass
onomancy divination using proper names
onomasiology study of nomenclature
onomastic of, like or pertaining to a name or signature
onomasticon dictionary of proper names
onomastics study of proper names
onomatomania irresistible desire to repeat certain words
onomatophobia fear of hearing a certain word
onomatous bearing the author’s name
ontal of, like or pertaining to reality or existence
ontocyclic returning to an infantile state or character in old age
ontogenesis origin and development of a single individual organism
ontography description of reality, essence or being
ontological based upon being or existence
ontology science of pure being; the nature of things
ontosophy knowledge of being or existence
onychocryptosis ingrowing toenail

Toe nails 1
onychoid like a fingernail
onychomancy divination by the fingernails
onychophagist nail-biter
onychophorous bearing nails or claws
onychotillomania compulsive picking at the fingernails
onymancy divination by the fingernails
onymatic of, like or pertaining to names
onymous bearing the author’s name
onymy scientific nomenclature
onyxis ingrown nail

Toe nails nailpolish
oogenesis production of eggs or ova
ooidal egg-shaped
oology study of eggs
oomancy divination using eggs
oometer instrument for measuring eggs
oophoron ovary
oose furry dust that gathers under beds
ootocous producing eggs; oviparous
opacimeter instrument for measuring opacity
opacular somewhat opaque
opalescence milky iridescence
opalotype photograph taken on a milky opal glass plate
opeidoscope instrument for illustrating sound by means of light
operculum cover or lid; lid-like organ or covering
operose laborious; tedious
ophelimity ability to please sexually; ability to satisfy
ophiasis baldness in wavy bands
ophic of, like or pertaining to serpents
ophicleide keyed bass brass musical instrument
ophidian of or like a snake
ophidiarium snake-house
ophidiomancy divination using snakes
ophidiophobia fear of snakes
ophiolatry worship of snakes
ophiology study of snakes
ophiomancy divination by watching snakes
ophiomormous snakelike
ophiomorphic shaped like a snake
ophiophagous eating snakes
ophiophilist snake-lover
ophism snake-worship
ophiuran brittle star
ophthalmometer instrument for measuring the eye
ophthalmophobia fear of being stared at
ophthalmoscope instrument for viewing the interior of the eye
opificer artificer
opinable capable of being thought
opiniaster one who obstinately holds to an opinion
opinicus mythic heraldic winged beast with lion’s body, eagle’s head, camel’s tail
opinionator one who holds or gives an opinion
opiomania craving for opium
opisometer instrument for measuring curved lines
opisthenar the back of the hand
opisthograph manuscript or slab inscribed on both back and front
opisthosomal of, like or pertaining to posteriors
opodeldoc soapy liniment
oppidan urban
oppignorate to pawn
oppilate to block up; to stop up
oppositive indicating opposition or location opposite to
opprobrium disgrace; bad reputation
oppugn to attack by argument; to oppose; to call in question
opsigamy one who marries late in life
opsimath one who learns late in life
opsiometer instrument for testing vision
opsomania abnormal love for one kind of food
opsonium anything eaten with bread as a relish
optative mood expressing a desire or wish
optics study of light
optimate of the nobility or aristocracy
optogram image fixed on the retina
optology study of sight
optometer instrument for testing vision
optophobia fear of opening one’s eyes
optophone device transforming light into sound
opuscule little work or composition
or before
or heraldic colour gold or yellow
orad toward the mouth
orad towards the mouth
oragious stormy
oralism instruction of the deaf through speech rather than sign language
orangery building for growing orange trees in a cool climate
orant representation of praying figure in early art
orarian coastal; a coast-dweller
orarion deacon’s stole in Orthodox church
orarium book of private devotions
orarium handkerchief; scarf attached to bishop’s staff
oratiuncle short oration
oratory small chapel for private prayer; lectern for prayer
orbific creating the world
orchesis act of dancing or rhythmical moving of the body
orchesography notation of dance movements by means of diagrams
orchidaceous exceptionally beautiful; gaudy; ostentatious
orchidology study of orchids
orchidomania abnormal obsession with orchids
orchidometer instrument for measuring the size of the testicles
ord point of a weapon; a beginning
ordalian of, like or pertaining to an ordeal
ordinal book containing religious rites, especially for ordination
ordinant one who ordains
ordinate in rows or columns
ordo calendar with list of services for each day of the year
ordonnance proper coordination of figures in a picture
ordure loathsome dirt or refuse; something morally degrading
oread mountain nymph
orectic of, like or pertaining to appetite or desires
oreillet earpiece of a helmet
oremus Roman Catholic liturgical prayer
orey-eyed expressing anger through the eyes
orf viral infection of sheep
orfèvrerie goldsmith’s work
organdie fine translucent cotton
organicism conception of life or society as an organism
organistrum early musical instrument resembling the hurdy-gurdy
organity an organized whole
organogenesis origin or development of living organs
organography scientific description of organs
organoleptic dealing with testing effects of a substance on senses
organon method of investigation; logical technique or system
organonomy laws of organic life
organza transparent thin silk or nylon
orguinette mechanical instrument with reeds and bellows, playing music from a paper roll
orgulous proud; haughty
oribi small African antelope with vertical horns
orichalc gold-coloured alloy; brass
oriel small room or recess with a polygonal bay window
oriflamme banner of red silk split into several points
oriform shaped like a mouth
orillion semicircular projection on a bastion to protect flanks
orismology technical definition or terminology
orison prayer
orleans interwoven cotton and worsted
orlop lowest deck in a ship having four or more decks

ormolu something expensive looking; gold-plated metal

69 will be more expensive tomorrow skmclasses Bangalore

ornithic of, like or pertaining to birds
ornithobiography life history of birds
ornithoid bird-like
ornithology study of birds
ornithomancy divination by observing flight of birds
ornithon aviary
ornithophilous pollinated by birds
ornithophobia fear of birds
ornithopter bird-like archaic flying machine
ornithoscopy bird watching
orobathymetric of, like or pertaining to map showing submerged heights and sea depths
orogen mountain pass
orogenesis mountain-building
orography description of mountains
orohydrography description of the role of mountains in forming watersheds
oroide alloy used to imitate gold
orology study of mountains
oropendola tropical oriole living in long hanging nests
orotund marked by fullness and clarity of sound; pompous
orphanotrophism care and support of orphans
orpharion large lute with six to nine pairs of strings
orphrey gold or other rich embroidery on clerical robes
orpiment yellow arsenic compound used as pigment
orrery clockwork model of the solar system
ort scrap of food; morsel
orthian high-pitched
orthobiosis correct or moral living
orthodromics great-circle sailing; sailing by most direct route
orthoepy study of correct pronunciation
orthogenesis directional evolution of organisms
orthognathism state of having straight jaws
orthographer correct speller
orthography study of spelling; proper spelling practices
orthology correct use of words
orthopraxis correct practice in religion
orthopter ornithopter; flying machine with moving wings
orthopterology study of cockroaches
orthostichous arranged in vertical rows
orthotomic cutting at right angles
orthotonic taking an accent in some but not all positions
orthotropism vertical growth
oryctognosy mineralogy
oryctography description of minerals; mineralography
oryctology mineralogy or paleontology
oryctomancy divination using excavated objects
oryx large antelope of Africa and Arabia with long horns
oryzivorous rice-eating
oscheal of, like or pertaining to the scrotum
oscillograph instrument for recording alternating current wave forms
oscillometer instrument for measuring ship’s rollings
oscilloscope instrument for detecting electrical fluctuations
oscinine of, like or pertaining to song-birds
oscitancy yawning; sleepiness; stupidity
oscitate to yawn
oscular of, like or pertaining to the mouth or to kissing
osculate to kiss
osculatory carved tablet kissed by priest during celebration of mass
osmatic having olfactory organs
osmesis act of smelling
osmics scientific study of smells
osmidrosis emission of ill-smelling sweat
osmol unit of osmotic pressure
osmology study of smells and olfactory processes
osmometer instrument for measuring osmotic pressure
osnaburg coarse linen or cotton
osophy belief or doctrine
osphresiology study of the sense of smell
osphresis sense of smell
ossein the organic basis of bone
ossia alternatively; rather (in music)
ossicle little bone or bone-like plate
ossiferous bearing bones
ossifrage osprey
ossify to change into bone; to become callous or conventional
ossivorous feeding on bones
ossomancy divination using bones
ossuary a depository for the bones of the dead
osteal of, like or pertaining to, or comprised of bone
ostensory container for holding consecrated Communion wafers
ostent appearance; manifestation
osteoclasis surgical breaking of a bone
osteogenesis production or formation of bone
osteography description of bones
osteoid bony; bone-like
osteology study of bones
osteomancy divination using bones
osteometry measurement of bones or skeleton
osteophone device used to allow deaf to hear sounds through the cranium
osteophyte abnormal bony outgrowth
ostiary doorkeeper
ostiolate having an opening
ostiole a small opening
ostium mouth-like opening
ostler person who takes care of horses at an inn and/or sells oats
ostracean of, like or pertaining to oysters
ostraceous of, like or pertaining to oysters
ostreiform shaped like an oyster
ostreoid oyster-like
ostreophagous oyster-eating
ostrichism habit or policy of refusing to face unpleasant facts
otacoustic aiding hearing
otalgia earache
otarine of, like or pertaining to seals
otic of, like or pertaining to the ear
otiose superfluous; redundant; futile; useless; functionless; idle
otolith calcium concretion in inside of vertebrate’s ear to aid in equilibrium
otology study of the ear
otorhinolaryngology study of ear, nose and throat
otoscope instrument for examining the ear
otosis mishearing of speech
ottoman heavy clothing fabric with crosswise ribs
oud wooden Middle Eastern lute
ounce medium to large-sized great cat
oundy wavy
ouranomancy divination using the heavens
ouroboros snake eating own tail symbolizing totality or completion
oustiti lock-opening tool
outage amount of commodity lost in transport and storage
outcept excluding; unless
outcross to breed individuals of different strains of a species
outfling sharp retort or gibe
outhaul rope used to haul a sail taut along a spar
outjet projection
outmantle to exceed in dress or ornament
outmaster to overcome in a contest for mastery
outrance the utmost extremity; the bitter end

outré beyond what is proper; extravagant

Outré conspicuously unconventional eccentric or bizarre acts by women

outrecuidance overwhelming arrogance or self-esteem
outremer area beyond the sea; overseas
outrigger spar extended from side of ship to help secure mast
outroop auction
out-through from end to end
outwith outside of
ouzel blackbird; a dark-haired person
ovarious consisting of eggs
overcross across; over
overcrow to crow or triumph over
overflush superfluity
overhaile to overtake; to overpower
overlock to oversew a hem or fabric edge to prevent fraying
overlong over the length of
overmantel ornamental structure set on a mantel-shelf
overpoise weight sufficient to weigh another down
overrack to overstrain
overset to upset; to disorder
overslaugh exemption from duty in turn when otherwise employed
overthwart from side to side of
ovibovine of, like or pertaining to musk-oxen
ovicide killing insect eggs
ovicide sheep-killing
oviferous egg-carrying
oviform like a sheep
oviform shaped like an oval or egg
ovigerous bearing eggs
ovil sheep-fold

ovine of, like or pertaining to sheep

Ovine woman A naughty woman who disturbs and bites like a sheep ovine

oviparous producing offspring through laying eggs
ovivorous eating eggs
ovivorous eating sheep
ovopyriform having a shape between a pear and an egg
ovoviviparous producing eggs which are hatched in parent’s body
ovuliferous bearing ovules
owlery place frequented by owls
owling smuggling wool or sheep
oxford soft durable plain-woven cotton
oxter to take under the arm; to support by taking the arm
oxyacaesthesia extreme sharpness of senses
oxyacanthous having sharp thorns
oxyblepsia extremely keen sight
oxygeusia extremely keen sense of taste
oxymoron figure of speech combining contradictory terms
oxyphonia sharpness or shrillness of voice
oxytocic drug that hastens the process of childbirth
oxytone word bearing acute accent on last syllable
oystercatcher wading shorebird with reddish bill
ozoniferous bearing ozone
ozostomia bad breath

(adj.) unyielding to persuasion or moral influences (The obdurate old man refused to take pity on the kittens.)
Obdurate is a formal word meaning stubborn. If you want to major in English, but your parents are obdurate that you should go premed, they might go so far

as to threaten not to pay your tuition.

This adjective descends from Latin obdurare “to harden.” A near synonym is adamant, from Latin adamas “hard metal, diamond.” So both of these synonyms

derive from the quality of hardness being associated with a stubborn personality.

(v.) to render incomprehensible (The detective did not want to answer the newspaperman’s questions, so he obfuscated the truth.)

(adj.) diverging from a straight line or course, not straightforward (Martin’s oblique language confused those who listened to him.)

(adj.) excessively compliant or submissive (Mark acted like Janet’s servant, obeying her every request in an obsequious manner.)

(adj.) noisy, unruly (Billy’s obstreperous behavior prompted the librarian to ask him to leave the reading room.)
Obstreperous means boisterous, noisy, aggressive, defiant. You’ve probably seen an obstreperous child in the grocery store, pulling away from her mother,

screaming at the top of her lungs.

If you’ve been to a large concert where the band doesn’t come on stage for hours, you might have been part of an obstreperous crowd: increasingly

impatient, with fights breaking out, things thrown up onto the stage, and demands being shouted, “Give us some music before the night is out!” Some people

are kind and gentle with strangers, but around their own family turn obstreperous, shouting “You never loved me!” at their mom when she gives them the

smaller of two cookies.

(adj.) lacking quickness of sensibility or intellect (Political opponents warned that the prime minister’s obtuse approach to foreign policy would

embroil the nation in mindless war.)

(adj.) instilling hatred or intense displeasure (Mark was assigned the odious task of cleaning the cat’s litter box.)

(adj.) offering one’s services when they are neither wanted nor needed (Brenda resented Allan’s officious behavior when he selected colors that might

best improve her artwork.)

onerous – If one teacher gives you three hours of homework a night, that’s rough. But if all of your teachers do it, that makes the task of completing your homework an onerous one, to say the least. If something is onerous, it is very difficult to deal with or do.

57 Office work at home

A near synonym is burdensome. In legal usage, onerous describes a contract or lease that has more obligations than advantages. Onerous derives from Middle

English, from Old French onereus, from Latin onerosus, from onus “burden.” In English, an onus is a task or duty that is onerous, or very difficult.

(adj.) characterized by rich abundance verging on ostentation (The opulent furnishings of the dictator’s private compound contrasted harshly with the

meager accommodations of her subjects.)

(adj.) appearing as such, seemingly (Jack’s ostensible reason for driving was that airfare was too expensive, but in reality, he was afraid of flying. ) When something is ostensible it appears to be the case but might not be. Research for a role is the ostensible reason for Nat’s drinking. But I think it’s because he just likes to drink.

Just because something is ostensible doesn’t necessarily mean that it’s not as it appears to be, only that there’s a possibility of another reason. My ostensible reason for calling Brent was to ask about work. The real reason was that I was hoping he might ask me out. Turns out both the ostensible reason and the real reason were true!

ostracism –

If you banish someone from society, you’ve caused that person’s ostracism. Quakers, for example, faced ostracism by Puritans in colonial Massachusetts and many of them fled to the nearby colony of Rhode Island.

Ostracism comes from the Greek word ostrakon, a broken shard of pottery. Athenians used pieces of pottery as a paper substitute in an annual vote in which citizens chose to banish someone from Athens for a period of ten years. The banished person had to leave (or face death) but was allowed to keep his property and could return when his ostracism was up. The vote was often used to get rid of potential tyrants and political rivals.