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Abbreviations Adjectives Collective Nouns Free Dictionary Colors Dictionary Rhyming Dictionary


O - Words that start with O - words starting with O
 oaf
a clumsy, stupid person
regarded as stupid or clumsy
 oak
a hardwood tree
 oar
to propel with long, broad-bladed poles
 oat
a kind of grass with edible seeds
 oba
a hereditary chief of Nigeria
 obdurate
unyielding, hardhearted; stubborn
 obedient
dutifully complying with the commands, orders, or instructions of one in authority
 obeisance
homage, deference; bow
 obelisk
tall column, monument; tall column tapering and ending in a pyramid
 obese
fat
 obfuscate
bewilder, muddle; confuse; cause confusion; make needlessly complex
 obi
a religious belief of African origin
 obituary
eulogy; death notice
 objective
unbiased; goal; aim; fair; not influenced by emotions
 objectivity
impartiality
 oblation
offering, sacrifice
 obligatory
required, compulsory; binding
 oblige
compel
 obliging
accommodating, considerate
 oblique
indirectslanting (deviating from the perpendicular or from a straight line)
 obliquity
perversity
 obliterate
destroy completely
 oblivion
obscurity; forgetfulness
 oblivious
lacking remembrance, memory, or mindful attention; inattentive or unmindful; wholly absorbed
 oblong
elliptical, oval
 obloquy
slander; disgrace; infamy
 obnoxious
offensive
 obscure
vague, unclear
 obsequious
fawning, servile; slavishly attentive; sycophantic
 obsequy
funeral ceremony
 observant
watchful
 observatory
a building or place given over to or equipped for observation of natural phenomena (as in astronomy)
 obsess
to haunt or excessively preoccupy the mind of
 obsessive
related to thinking about something constantly; preoccupying
 obsidian
black volcanic rock
 obsolete
outdated; outmoded
 obstacle
something that impedes progress or achievement
 obstetrician
physician specializing in delivery of babies
 obstinate
stubborn; hard to control or treat
 obstreperous
noisy, unruly; boisterous
 obstruct
to hinder from passage, action, or operation
 obtain
gain possession
 obtrude
push (oneself or one's ideas) forward or intrude; butt in; stick out or extrude
 obtrusive
forward, meddlesome
 obtuse
stupid; blunt
 obviate
make unnecessary; get rid of
 oca
a South American wood sorrel cultivated for its edible tubers
 occident
the West
 occlude
block; shut; close
 occult
mystical, secret, relating to the supernatural or witchcraft; mysterious; secret; supernatural
 occurrence
something that occurs
 och
expression to express impatience, regret, surprise or anger
 octogenarian
person in her eighties
 ocular
optic, visual
 oculist
physician who specializes in treatment of the eyes
 oda
a room in a harem
 odd
unusual; strange
 odd
odd
 ode
poem
 ode
a lyric poem
 odious
despicable; hateful; vile
 odium
hatred and condemnation accompanied by loathing or contempt; detestation; hatefulness; disrepute
 odoriferous
pleasant odor; giving off an odor
 odorous
having an odor
 ods
hypothetical forces of natural power (plural of OD)
 odyssey
long, eventful journey
 oes
whirlwinds off the Faroe islands (plural of OE)
 off
to go away
 offal
inedible parts of a butchered animal
 offbeat
not conforming to an ordinary type or pattern; unconventional
 offend
to cause dislike, anger, or vexation
 offensive
attacking; insulting; distasteful
 offertory
church collection
 offhand
without premeditation or preparation; casual; done without prior thought
 officiate
supervise
 officious
forward, obtrusive; meddlesome; excessively pushy in offering one's services
 offish
somewhat cold and reserved
 offset
counterbalance
 offshoot
something that comes from something else
 oft
frequently; often
 ogle
flirt; look at amorously; make eyes at
 ogre
monster, demon
 ohm
a unit of electrical resistance
 oho
An exclamation of surprise or exultation
 ohs
exclamations of surprise or exultation (plural of OH)
 oik
a rude and stupid person
 oil
a slippery or viscous liquid
 oka
a Turkish unit of weight
 oke
a Turkish unit of weight
 oleaginous
oily
 old
living or existing for a relatively long time
 ole
a shout of approval
 olfactory
concerning the sense of smell
 oligarchy
aristocracy; government by a privileged few
 olio
medley
 olive
olive
 olm
a cave-dwelling European salamander
 ominous
threatening
 omnibus
collection, compilation
 omnipotent
all-powerful
 omnipresent
present everywhere simultaneously; universally present; ubiquitous
 omniscient
all-knowing
 omnivorous
eating both plant and animal food; devouring everything
 oms
mantras (plural of OM)
 one
an individual person or thing
 onerous
burdensome
 onomatopoeia
words formed in imitation of natural sounds
 ons
in operations (plural of ON)
 onslaught
powerful attack; fierce attack; vicious assault
 ontology
the study of the nature of existence
 onus
burden; responsibility
 ooh
to exclaim in amazement, joy, or surprise
 oop
to bind with thread
 oor
belonging to us
 oos
Hawaiian birds (plural of OO)
 oot
out
 opacity
the quality or state of a body that makes it impervious to the rays of light
 opal
opal
 opalescent
iridescent; lustrous
 opaque
nontransparent; dark
 ope
to open
 operative
working
 operetta
musical comedy
 opiate
narcotic; medicine to induce sleep or deaden pain; something that relieves emotions or causes inaction
 opine
think, express an opinion
 opportune
well-timed, appropriate timely; well-chosen
 opportunist
individual who sacrifices principles for expediency by taking advantage of circumstances
 oppose
to place over against something so as to provide resistance, counterbalance, or contrast
 oppress
persecute
 oppression
unjust or cruel exercise of authority or power
 oppressive
burdensome
 opprobrious
abusive, scornful
 opprobrium
disgrace; infamy, vilification
question the validity or truthfulness of
 ops
abstract arts (plural of OP)
 opt
choose
 opt
decide, choose
 optician
maker and seller of eyeglasses
 optimal
most desirable or satisfactory
 optimist
person who looks on the bright side
 optimization
an act, process, or methodology of making something (as a design, system, or decision) as fully perfect, functional, or effective as possible
 optimum
best condition; most favorable
 optional
elective; not compulsory; left to one's choice
 optometrist
one who fits glasses to remedy visual defects
 opulence
wealth; luxuriousness; abundance
 opulent
amply or plentifully provided or fashioned often to the point of ostentation
 opus
literary work or musical composition; work
 ora
orifices (plural of OS)
 oracle
prophet
 oracular
prophetic; uttered as if with divine authority; mysterious or ambiguous
 orange
orange
 Orange River
longest river in South Africa
 oration
speech
 orator
public speaker
 oratorio
dramatic poem set to music
 orb
sphere
 orb
an object with a spherical shape
 orchestrate
organize
 ordain
appoint; decree or command; grant holy orders; predestine
 orc
an ugly mythical creature
 orchid
a flower
 ordeal
severe trial or affliction
 orderly
neat, arranged
 ordinance
law; decree
 ordinary
of no exceptional ability, degree, or quality; average
 ordination
ceremony conferring holy orders
 ordnance
artillery
 ore
a mineral or rock containing a valuable metal
 orf
sore mouth
 orgy
wild, drunken revelry; unrestrained indulgence
 orient
align, familiarize; get one's bearings; adjust
 orientation
act of finding oneself in society
 orifice
mouthlike opening; small opening
 original
not secondary, derivative, or imitative
 Orinoco River
longest river in Venezuela
 orison
prayer
 Orkhon River
longest river in Mongolia
 ornate
lavishly decorated; excessively or elaborately decorated
 ornithologist
scientific student of birds
 ors
the heraldic colors gold (plural of OR)
 ort
a scrap of food; morsel
 ornithology
study of birds
 orthodox
conventional; traditional; conservative in belief
 orthodoxy
the quality or state of being conforming to established doctrine especially in religion
 orthography
correct spelling
 oscillate
waver, swing; vibrate pendulumlike; waver
 ose
a narrow ridge of gravel and sand
 osseous
made of bone; bony
 ossify
harden; change or harden into bone
 ostensible
apparent, seeming; professed; pretended
 ostentation
showiness
 ostentatious
pretentious; showy; trying to attract attention
 ostracism
exclusion by general consent from common privileges or social acceptance
 ostracize
banish, shun; exclude from public favor; ban
 otherworldly
spiritual
 otiose
idle
 oud
a stringed instrument of northern Africa
 Ouémé River
longest river in Benin
 ouk
a period of seven days; a week
 our
belonging to us
 oust
to eject from a position or place; expel; drive out
 ouster
ejection
 out
away from an area, town, or country
 outgoing
openly friendly and responsive
 outlandish
conspicuously unconventional; bizarre; peculiar
 outmaneuver
to overcome (an opponent) by artful, clever maneuvering
 outmoded
out-of-date; no longer stylish; old fashioned
 outre
eccentric
 outset
beginning
 outskirts
fringes; outer borders
 outspoken
candid; blunt
 outstrip
surpass; outdo
 outwit
to get the better of by superior cleverness; outsmart; trick
 ova
an egg; the female reproductive cell of animals
 ovation
enthusiastic applause
 overbearing
harshly and haughtily arrogant; bossy; decisively important
 overdose
too great a dose (as of a therapeutic agent)
 overexposure
to expose excessively; especially :to expose (as film) to excessive radiation (as light)
 overhaul
to examine thoroughly
 overlap
to occupy the same area in part
 overrule
disallow
 overt
open to view
 overture
advance, proposal
 overweening
arrogant, forward; presumptuous
 overwhelm
overpower
 overwrought
overworked, highstrung; extremely agitated; hysterical
 ovoid
g-shape
 ovum
egg, cell
 owe
to be under obligation to pay
 owl
a nocturnal bird
 own
to have as a possession
 owt
anything
 oxo
containing oxygen
 oxymoron
a combination of contradictory or incongruous words, for example "open secret", "young-old man"
 oye
a grandchild
 oys
grandchildren (plural of OY)

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