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Adjectives beginning with O:

  • oafish
  • oak
  • oat
  • oaten
  • oatmeal
  • obdurate
  • obedient
  • obeisant
  • obese
  • objectionable
  • objective
  • oblate
  • obligated
  • obligational
  • obligatory
  • obliging
  • oblique
  • oblivious
  • oblong
  • obnoxious
  • obscene
  • obscure
  • obsequious
  • observable
  • observant
  • observational
  • obsessed
  • obsessive
  • obsolescent
  • obsolete
  • obstetric
  • obstinate
  • obstreperous
  • obtainable
  • obtrusive
  • obtuse
  • obvious
  • occasional
  • occidental
  • occipital
  • occlusive
  • occult
  • occupational
  • occupied
  • oceanic
  • ocher
  • octagonal
  • octogenarian
  • ocular
  • odd
  • oddball
  • odious
  • odorant
  • odoriferous
  • odorous
  • off
  • off balance
  • off campus
  • off color
  • off key
  • off-color
  • offbeat
  • offensive
  • offhand
  • official
  • offshore
  • often
  • oiled
  • oily
  • okay
  • old
  • old-fashioned
  • old-world
  • olden
  • older
  • oldest
  • oleic
  • olfactory
  • olive
  • Olympian
  • Olympic
  • ominous
  • omnipotent
  • omnipresent
  • omniscient
  • omnivorous
  • oncoming
  • one
  • one-sided
  • onerous
  • onetime
  • ongoing
  • only
  • onrushing
  • ontological
  • opal
  • opalescent
  • opaque
  • open
  • open-ended
  • open-minded
  • opened
  • operable
  • operatic
  • operating
  • operational
  • operative
  • ophthalmic
  • opinionated
  • opportune
  • opportunistic
  • opposing
  • opposite
  • oppositional
  • oppressive
  • opprobrious
  • optic
  • optical
  • optimal
  • optimistic
  • optimum
  • optional
  • opulent
  • oracular
  • oral
  • orange
  • oratorical
  • oratory
  • orbital
  • orchestral
  • orchid
  • orderly
  • ordinary
  • organic
  • organized (also spelled organised)
  • orgasmic
  • orgastic
  • oriental
  • oriented
  • original
  • ornamental
  • ornate
  • ornery
  • ornithological
  • orotund
  • orthodontic
  • orthodox
  • orthogonal
  • orthopedic
  • oscillating
  • ossified
  • ostensible
  • ostentatious
  • other
  • otiose
  • our
  • oustanding
  • outback
  • outboard
  • outbound
  • outdated
  • outdoor
  • outer
  • outermost
  • outgoing
  • outlandish
  • outlying
  • outrageous
  • outright
  • outside
  • outspoken
  • outstanding
  • outward
  • oval
  • ovarian
  • ovate
  • over
  • overactive
  • overaggressive
  • overall
  • overanxious
  • overbearing
  • overblown
  • overboard
  • overcast
  • overconfident
  • overcooked
  • overcrowded
  • overdeveloped
  • overdone
  • overdue
  • overexposed
  • overhead
  • overheated
  • overjoyed
  • overloaded
  • overnight
  • overpaid
  • overpowering
  • overpriced
  • overprotective
  • overqualified
  • overrated
  • overseas
  • oversensitive
  • oversize
  • oversized
  • overstimulated
  • overt
  • overweight
  • overwhelmed
  • overwhelming
  • overworked
  • overwrought
  • oviparous
  • ovoid
  • owlish
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Wiki User

8y ago
This answer is:
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Anonymous

Lvl 1
3y ago
Can't understand all that
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Anonymous

Lvl 1
3y ago
I DONT UDERSTAND YOU 
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Anonymous

Lvl 1
3y ago
:D
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Anonymous

Lvl 1
3y ago
overwhelming!
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Anonymous

Lvl 1
3y ago
YOU ALL I HATE THIS APP
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BAILEY COLE

Lvl 1
2y ago
thats amazing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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BAILEY COLE

Lvl 1
2y ago
I cant even do that you are amazing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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JOSEPH JOHNSON

Lvl 1
2y ago
cool
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JOSEPH JOHNSON

Lvl 1
2y ago
old-fashioned
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JOSEPH JOHNSON

Lvl 1
2y ago
oafish old-fashioned obedient obese
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Valerie Han

Lvl 1
2y ago
awesome
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Sarai Hunt-Moore

Lvl 1
2y ago
same
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Pro

Lvl 1
2y ago
oat
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Chardanay Walker

Lvl 1
2y ago
u look like u put all the O words in the entire world *sheesh*
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jiyushii

Lvl 1
1y ago
Wow 😳 that’s a loy
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Reyansh Verman

Lvl 1
8mo ago
Here are some adjectives that begin with the letter O: Outstanding Optimistic Organic Observant Outgoing Original Open-minded Overjoyed Overwhelming Ornate
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Tia

Lvl 2
3y ago

Adjectives That Start With O

You’ll find some obvious and some obscure adjectives that start with O. But either way, choices for adjectives starting with O are opulent. You’ll also find a definition and example for one of the adjectives starting with O.

Adjectives that start with O:

Obedient 

Obscure 

Occidental 

Odd 

Odorous 

Oily 

Ominous 

Opulent
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Jonas Mandele

Lvl 1
3y ago
thank's
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Tia

Lvl 1
3y ago
your welcome i am only 13 and i am smart
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Valerie Han

Lvl 1
2y ago
I am only 9 and I know more than you
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Valerie Han

Lvl 1
2y ago
sorry. I just wanted to tell you

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Jasmine Navichoque

Lvl 2
3y ago

oak tree, of, otto, otter, ocean, october, on, onto, off, oh, orange, over, obey, o, out, oatmeal, opponent, obstacle, old, opossum, orbit, ordinary, oxygen, ostrich, ornament. All words I could think of!

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Chiropractor

Lvl 2
4y ago

At Alleve Total Wellbeing, we work in partnership with you and your body’s potential to achieve optimal personal health and wellbeing through movement, education and our multifaceted style of therapy. http://allevetotalwellbeing.com.au/

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Riley Luminarias

Lvl 2
3y ago

odd

obedient

obese

obliging

objectionable

obscene

observant

obsolete

obtuse

occasional

offensive

oily

omnipotent

omniscient

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Alyssa Belando

Lvl 2
4y ago

Orange, Optimistic, Outstanding

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Valerie Han

Lvl 2
2y ago

oafish - clumsy; uncultured

obedient - obeying or willing to obey; submissive

obese - very fat; stout; corpulent

objectionable - disagreeable; offensive

obliging - ready to do favors; helpful; courteous; accommodating

oblique - slanting

obnoxious - very unpleasant

obscene - offensive to one's feelings, or to prevailing notions of modesty or decency; lewd; disgusting; repulsive

obscure - not clear

observant - paying careful attention; keenly watchful; perceptive or alert

obsessive - consuming; being consumed

obsolete - no longer in use or practice; discarded

obtuse - slow to understand or perceive; dull or insensitive; in math, greater than 90 degrees and less than 180 degrees

obvious - clear; apparent

occasional - of irregular occurrence; happening now and then; infrequent

odd - not usual or ordinary; singular; peculiar; strange; queer; eccentric; in numbers, not even, or having a remainder of one when divided by two

odious - repulsive; revolting

offbeat - unusual

offensive - unpleasant, as to the senses; disgusting; repugnant; causing resentment, anger, etc.

oily - of, like, consisting of, or containing oil; covered with oil; greasy

older - not young; lived for a long time

old-fashioned - behind the times; not current

omnipotent - having unlimited power or authority; all-powerful

omniscient - having infinite knowledge; knowing all things

omnivorous - eating both plants and animals

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Adjectives That Start With Op-Ou

You are on your way to building an outstanding vocabulary. Now, it's time to learn adjectives that begin with op- to ou-.

opaque - not letting light pass through; not transparent or translucent; not reflecting light; not shining or lustrous; dull, dark

open-minded - unbiased; consider new ideas

operable - useable; can be used

operative - functioning; effective

opportune - happening or done at the right time; seasonable; well-timed; timely

opportunist - taking advantage of the situation for personal benefit

opposing/opposed - set against; placed opposite, in balance or contrast; contending within speech or action; resisting; withstanding

opposable - can touch other digits on hand (opposable thumb)

opposite - different in every way; exactly contrary

oppressive - unjust treatment; cruel; tyrannical

optimal - best; most favorable

optimistic - having the tendency to take the most hopeful or cheerful view of matters or to expect the best outcome

opulent - very wealthy or rich; characterized by abundance; luxuriant

oral - spoken by the mouth

orange - color between red and yellow

ordinary - not special; normal; usual

original - having to do with an origin, first, earliest; fresh, new, novel; capable of or given to inventing or creating something new

ornamental - decorative

ornate - elaborate; embellished

orthodox - conforming to the usual beliefs or established doctrines, as in religion, politics, etc.; approved or conventional

ostentatious - characterized by or given to pretentious or conspicuous show in an attempt to impress others

outlandish - bizarre; unfamiliar; weird

outrageous - having the nature of, involving, or doing great injury or wrong; exceeding all bounds of decency or reasonableness; very offensive or shocking; unrestrained

outspoken - express opinions directly; blunt

outstanding - prominent; distinguished; excellent; marked by superiority or distinction; unsettled, unpaid, uncollected

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10 Adjectives That Start With O Example Sentences

Knowing adjectives is good, but being able to use them in a sentence is even better. Explore these 10 sentences using "o" adjectives.

The old man had trouble opening the door.

The girl cherished the opaque onyx her mother gave her.

The orange cat jumped on the table.

The odd dog walked along the fence.

It was a quaint, old-fashioned house.

An oppressive leader controls every part of the government.

She had an optimistic attitude about the upcoming test.

He was just an ordinary boy that lived next door.

Her house had an ornate porch.

Our neighbor decorated with outlandish Halloween decorations.

Short Story: The Optimistic Octogenarian

Once you've read through the example sentences, take a look at the accompanying short story, which uses at least 30 outstanding adjectives that begin with "o!" The use of that many "o" adjectives in one tale may be a tad out of the ordinary, but it’s certainly original!

The old woman walked home in an odd mood considering the meeting she’d just had. She’d always been optimistic, but this kind of optimism, in the face of such a situation, bordered on outrageous or even obscene.

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Valerie Han

Lvl 1
2y ago
Ignore the word 'Advertistment' please. It just got messed up with my work.
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Domingo Boyle

Lvl 1
2y ago
love this answer
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Valerie Han

Lvl 1
2y ago
Thank you
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Tito Nolan

Lvl 1
2y ago
awesome thanks!
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Susie Johns

Lvl 1
2y ago
u googled that and u know it
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Valerie Han

Lvl 1
2y ago
that is not a very nice thing to say
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Valerie Han

Lvl 1
2y ago
welcome to those who said thank you

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kwalabapuzo

Lvl 7
2y ago

Adjectives that begin with the letter O are listed in this post. obedient, obese, objectionable, objective, obligatory, obliging, oblique, oblivious, obnoxious, obscene, obscure, obsessed, obsessive, obsolete, obstinate, obtuse, obvious occasional, occupational, oceanfront, oceanographic, octave odd, oddball, oddest, odious

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Riley Glover

Lvl 1
2y ago
Can you explain that answer

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Ashvath Tadipatri

Lvl 5
2y ago

oafish

obedient

obese

objectionable

objective

obligatory

obliging

oblique

oblivious

oblong

obnoxious

obscene

obscure

observable

observant

obsessive

obsolete

obstinate

obstructive

obtainable

obtrusive

obtuse

obvious

occasional

occupational

occupied

oceanic

odd

odd-looking

odiferous

odious

odorless

odorous

offbeat

offensive

offhanded

official

officious

oily

OK

okay

old

older

oldest

old-fashioned

ominous

omniscient

omnivorous

one

one-hour

onerous

one-sided

only

opaque

open

opened

openhanded

openhearted

opening

open-minded

operable

operatic

operational

operative

opinionated

opportune

opportunistic

opposable

opposed

opposing

opposite

oppressive

optimal

optimistic

optional

opulent

oral

orange

orangish

ordinary

organic

organizational

original

ornamental

ornate

ornery

orphaned

orthopedic

ostentatious

other

otherwise

our

outer

outermost

outgoing

outlandish

outraged

outrageous

adjectives that start with A

outside

outspoken

outstanding

outward

oval

overactive

overaggressive

overall

overambitious

over-assertive

overbearing

overcast

overcautious

overconfident

overcooked

overcritical

overcrowded

overemotional

overenthusiastic

overjoyed

overoptimistic

overpowering

overpriced

overprotective

overqualified

overrated

oversensitive

over sized

overt

overwhelmed

overwhelming

overworked

overwrought

overzealous

own

one

one-sided

only

openhearted

open-minded

opinionated

opportunistic

oppressive

optimistic

opulent

ordinary

original

ornery

orphaned

ostentatious

outgoing

outlandish

outraged

outrageous

outspoken

outstanding

overactive

overaggressive

overambitious

over-assertive

overbearing

overcautious

overconfident

overcritical

overemotional

overenthusiastic

overjoyed

overoptimistic

overpowering

overprotective

overqualified

overrated

oversensitive

overwhelmed

overwhelming

overworked

overwrought

overzealous

Positive Adjectives That Start With O

objective

obliging

obtainable

omniscient

openhanded

openhearted

open-minded

opportune

optimal

optimistic

optional

opulent

organic

original

ornamental

ornate

outgoing

outstanding

overjoyed

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Pro

Lvl 2
2y ago

oak

oat

oaten

oatmeal

obdurate

obedient

obeisant

obese

objectionable

objective

oblate

obligated

obligational

obligatory

obliging

oblique

oblivious

oblong

obnoxious

obscene

obscure

obsequious

observable

observant

observational

obsessed

obsessive

obsolescent

obsolete

obstetric

obstinate

obstreperous

obtainable

obtrusive

obtuse

obvious

occasional

occidental

occipital

occlusive

occult

occupational

occupied

oceanic

ocher

octagonal

octogenarian

ocular

odd

oddball

odious

odorant

odoriferous

odorous

off

off balance

off campus

off color

off key

off-color

offbeat

offensive

offhand

official

offshore

often

oiled

oily

okay

old

old-fashioned

old-world

olden

older

oldest

oleic

olfactory

olive

Olympian

Olympic

ominous

omnipotent

omnipresent

omniscient

omnivorous

oncoming

one

one-sided

onerous

onetime

ongoing

only

onrushing

ontological

opal

opalescent

opaque

open

open-ended

open-minded

opened

operable

operatic

operating

operational

operative

ophthalmic

opinionated

opportune

opportunistic

opposing

opposite

oppositional

oppressive

opprobrious

optic

optical

optimal

optimistic

optimum

optional

opulent

oracular

oral

orange

oratorical

oratory

orbital

orchestral

orchid

orderly

ordinary

organic

organized (also spelled organised)

orgasmic

orgastic

oriental

oriented

original

ornamental

ornate

ornery

ornithological

orotund

orthodontic

orthodox

orthogonal

orthopedic

oscillating

ossified

ostensible

ostentatious

other

otiose

our

oustanding

outback

outboard

outbound

outdated

outdoor

outer

outermost

outgoing

outlandish

outlying

outrageous

outright

outside

outspoken

outstanding

outward

oval

ovarian

ovate

over

overactive

overaggressive

overall

overanxious

overbearing

overblown

overboard

overcast

overconfident

overcooked

overcrowded

overdeveloped

overdone

overdue

overexposed

overhead

overheated

overjoyed

overloaded

overnight

overpaid

overpowering

overpriced

overprotective

overqualified

overrated

overseas

oversensitive

oversize

oversized

overstimulated

overt

overweight

overwhelmed

overwhelming

overworked

overwrought

oviparous

ovoid

owlish

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