Starting with OA
Starting with OB
- obdurate
- obedient
- obese
- objectionable
- objective
- oblanceolate
- oblate
- obligate
- obligated
- obligational
- obligatory
- obliged
- obliging
- oblique
- obliterable
- obliterate
- obliterated
- oblivious
- oblong
- obnoxious
- obovate
- obscene
- obscure
- obsequious
- observable
- observant
- observational
- observed
- observing
- obsessed
- obsessional
- obsessive
- obsolescent
- obsolete
- obstetric
- obstetrical
- obstinate
- obstreperous
- obstructed
- obstructive
- obtainable
- obtrusive
- obtuse
- obviating
- obvious
Starting with OC
- occasional
- occidental
- occipital
- occluded
- occlusive
- occult
- occupational
- occupied
- occurrent
- oceangoing
- oceanic
- ocellated
- ocher
- ochre
- octagonal
- octal
- octangular
- octogenarian
- octosyllabic
- octuple
- ocular
Starting with OD
Starting with OE
Starting with OF
- off
- offbeat
- offenceless
- offended
- offending
- offenseless
- offensive
- offhand
- offhanded
- official
- officious
- offish
- offshore
- offside
- offsides
- offstage
Starting with OH
Starting with OI
Starting with OK
Starting with OL
- old
- olden
- older
- oldish
- oldline
- oleaceous
- oleaginous
- oleophilic
- oleophobic
- olfactive
- olfactory
- oligarchic
- oligarchical
- olive
- olivelike
- olympian
- olympic
Starting with OM
- omani
- ominous
- omissible
- omissive
- omnibus
- omnidirectional
- omnifarious
- omnipotent
- omnipresent
- omniscient
- omnivorous
Starting with ON
- on
- oncologic
- oncological
- oncoming
- one
- oneiric
- onerous
- onetime
- ongoing
- online
- only
- onomastic
- onomatopoeic
- onomatopoeical
- onomatopoetic
- onshore
- onside
- onstage
- ontogenetic
- ontological
- onymous
Starting with OO
Starting with OP
- opalescent
- opaline
- opaque
- open
- opencast
- opencut
- opened
- openhanded
- openhearted
- opening
- openmouthed
- operable
- operant
- operatic
- operating
- operational
- operationalist
- operative
- operculate
- operculated
- operose
- ophthalmic
- opinionated
- opinionative
- opisthognathous
- opponent
- opportune
- opportunist
- opportunistic
- opposable
- opposed
- opposing
- opposite
- oppositive
- oppressed
- oppressive
- opprobrious
- optative
- optic
- optical
- optimal
- optimistic
- optimum
- optional
- opulent
Starting with OR
- oracular
- oral
- orange
- orangish
- oratorical
- orbicular
- orbiculate
- orbital
- orbitual
- orchestral
- orchestrated
- ordained
- ordered
- orderly
- ordinal
- ordinary
- organic
- organicistic
- organisational
- organised
- organismal
- organismic
- organizational
- organized
- orgiastic
- oriental
- orientated
- orientating
- oriented
- orienting
- original
- originative
- ornamental
- ornate
- ornery
- ornithological
- oropharyngeal
- orotund
- orphaned
- orphic
- orthodontic
- orthodox
- orthogonal
- orthographic
- orthomolecular
- orthopaedic
- orthopedic
- orthopedical
- orthoptic
- orthostatic
- orthotropous
- orwellian
Starting with OS
- oscillating
- oscillatory
- oscine
- oscitant
- osmotic
- osseous
- ossicular
- ossiculate
- ossiferous
- ossified
- osteal
- ostensible
- ostensive
- ostentatious
Starting with OT
Starting with OU
- out
- outback
- outboard
- outbound
- outbred
- outcast
- outcaste
- outclassed
- outdated
- outdoor
- outdoorsy
- outer
- outermost
- outfitted
- outflowing
- outgoing
- outlandish
- outlaw
- outlawed
- outlined
- outlying
- outmoded
- outmost
- outraged
- outrageous
- outre
- outrigged
- outright
- outside
- outsize
- outsized
- outspoken
- outspread
- outstanding
- outstretched
- outward
Starting with OV
- oval
- ovarian
- ovate
- over
- overabundant
- overactive
- overage
- overaged
- overall
- overambitious
- overanxious
- overarm
- overawed
- overbearing
- overblown
- overbold
- overburdened
- overbusy
- overcareful
- overcast
- overcautious
- overconfident
- overcredulous
- overcritical
- overcurious
- overdelicate
- overdone
- overdressed
- overdue
- overeager
- overemotional
- overenthusiastic
- overexcited
- overfamiliar
- overfed
- overflowing
- overfond
- overfull
- overgenerous
- overgreedy
- overgrown
- overhand
- overhanded
- overhasty
- overhead
- overheated
- overindulgent
- overjealous
- overjoyed
- overladen
- overland
- overlarge
- overloaded
- overlooked
- overlooking
- overlying
- overmodest
- overmuch
- overnice
- overnight
- overpowering
- overpriced
- overprotective
- overproud
- overreaching
- overrefined
- overriding
- overripe
- oversea
- overseas
- oversensitive
- overserious
- oversewn
- oversexed
- overshot
- oversize
- oversized
- oversolicitous
- overstated
- overstrung
- overstuffed
- oversubscribed
- oversuspicious
- overt
- overturned
- overvaliant
- overweening
- overweight
- overwhelming
- overwrought
- overzealous
- oviform
- ovine
- oviparous
- ovoid
- ovoviviparous
- ovular
Starting with OW
Starting with OX
Interesting Categories for the Adjectives Starting with O
The Interesting Adjectives category include adjectives which can make the text more exciting to read or hear. For the Positive Adjectives lists, the words included are those which convey the favorable qualities of a person, event or place, while the Negative Adjectives categories are composed of undesirable characteristics.
Adjectives that Start with O
Interesting Adjectives
oblique: neither parallel nor at a right angle to a specified or implied line; slanting
– we sat on the settee oblique to the fireplace
oblivious: not aware of or not concerned about what is happening around one
– she became absorbed, oblivious to the passage of time
obscure: not discovered or known about; uncertain
– his origins and parentage are obscure
obsequious: obedient or attentive to an excessive or servile degree
– they were served by obsequious waiters
obsolescent: becoming obsolete
– the custom is now obsolescent
Positive Adjectives to Describe a Person
obedient: complying or willing to comply with orders or requests; submissive to another’s will
– she was totally obedient to him
objective: free of bias; not influenced by personal feelings or opinions in considering and representing facts
– historians try to be objective and impartial
observant: quick to notice things
– her observant eye took in every detail
omniscient: knows everything
– the story is told by an omniscient narrator
optimistic: hopeful and confident about the future
– she remained optimistic despite the trials
Positive Adjectives to Describe an Event
observable: able to be noticed or perceived; discernible
– observable differences
official: relating to an authority or public body and its duties, actions, and responsibilities
– the governor’s official engagements
oncoming: due to happen or occur in the near future
– the oncoming Antarctic winter
operatic: of, relating to, or characteristic of opera
– operatic performance
opportune: well-chosen or particularly favorable or appropriate
– he couldn’t have arrived at a less opportune moment
Positive Adjectives to Describe a Place
oceanic: of or relating to the ocean.
– oceanic atolls
offshore: situated at sea some distance from the shore.
– this huge stretch of coastline is dominated by offshore barrier islands
opalescent: showing varying colors as an opal does
– an opalescent river
operational: in or ready for use
– the new laboratory is fully operational
opulent: rich and luxurious or lavish
– opulent hotel room
Negative Adjectives to Describe a Person
oafish: stupid, uncultured, or clumsy
– her oafish husband
obnoxious: extremely unpleasant
– He was a woman-chasing, obnoxious bastard in a dozen different ways.
obsessive: affected by an obsession
– she became obsessive about her schoolwork
offhand: ungraciously or offensively nonchalant or cool in manner.
– his offhand way of talking
officious: assertive of authority in an annoyingly domineering way, especially with regard to petty or trivial matters.
– a policeman came to move them on, an officious, spiteful man
Negative Adjectives to Describe an Event
objectionable: arousing distaste or opposition; unpleasant or offensive.
– I find his theory objectionable in its racist undertones.
obstinate: (of an unwelcome phenomenon or situation) very difficult to change or overcome
– the obstinate problem of unemployment
offensive: causing someone to feel deeply hurt, upset, or angry.
– the allegations made are deeply offensive to us
ominous: giving the impression that something bad or unpleasant is going to happen; threatening; inauspicious.
– there were ominous dark clouds gathering overhead
onerous: involving an amount of effort and difficulty that is oppressively burdensome.
– he found his duties increasingly onerous
Negative Adjectives to Describe a Place
obscene: offensive or disgusting by accepted standards of morality and decency
– obscene gallery
odd: different from what is usual or expected; strange
– odd neighborhood
odious: extremely unpleasant; repulsive
– the whole area was an odious wilderness
oily: covered or soaked with oil
– oily deck
oppressive: unjustly inflicting hardship and constraint, especially on a minority or other subordinate group
– oppressive country
Heroic Adjectives
olympian: befitting or characteristic of an Olympian; especially : LOFTY
– his Olympian image
outstanding: exceptionally good
– an outstanding soldier
overactive: excessively active
– an overactive guardian
overt: done or shown openly; plainly or readily apparent, not secret or hidden.
– an overt act of bravery
overwhelming: very strong; very great in amount
– his overwhelming accomplishments
Sporty Adjectives
olympic: of or relating to the ancient city of Olympia or the Olympic Games.
– an Olympic champion
orthopedic: relating to orthopedics
– the injured athlete has undergone orthopedic treatment
outdoor: fond of the open air or open-air activities
– a rugged, outdoor type
outright: undisputed; clear
– an outright victory
overactive: excessively active
– an overactive midfielder
Romantic Adjectives
open: (of a person) frank and communicative; not given to deception or concealment.
– she was open and sincere
otherworldly: seeming to belong to or come from another world
– otherworldly beauty
outgoing: friendly and socially confident
– she’s an extremely affable, jovial, outgoing type of person
outspoken: frank in stating one’s opinions
– her outspoken nature
overjoyed: extremely happy
– overjoyed to see you
Shortest Adjectives
ok: being satisfactory or in satisfactory condition
– an ok movie
on: in operation or operational
– left the oven on
odd: not easily explained
– it is odd that his name is never mentioned
off: not performing or scheduled for duties; not in operation or operational
– the lights are off
old: just preceding something else in time or order
– my old house was larger
one: eminent beyond or above comparison
– she’s one girl in a thousand
out: being out or having grown cold
– the fire is out
own: belonging to or on behalf of a specified person (especially yourself); preceded by a possessive
– for your own use
oily: smeared or soiled with grease or oil
– get rid of rubbish and oily rags
Longest Adjectives
overenthusiastic: unduly enthusiastic
– overenthusiastic fans
omnidirectional: not directional
– omnidirectional antenna
opisthognathous: having receding jaws
– opisthognathous insects
onomatopoeical: (of words) formed in imitation of a natural sound
– onomatopoeic words are imitative of noises
operationalist: of or relating to or espousing operationalism
– operationalist doctrine
organisational: of or relating to an organization
– organisational behavior
organizational: of or relating to an organization
– organizational structure
ornithological: of or relating to ornithology
– her ornithological interests
orthomolecular: designating or relating to a form of treatment of mental disorders that seeks to restore biochemical balance in the body with large doses of vitamins and minerals
– orthomolecular medicine
overprotective: overly protective
– overprotective parents