In this article, we are going to talk about adjectives that start with O. Adjectives tell you how much or how many of something you’re talking about, which thing you want passed to you, or which kind of something you want, etc.
Adjectives are also known as descriptive words since they describe both concrete and abstract items in the world. They convey feelings and sensations, as well as sizes and dimensions, shapes and colors, and so on. In the list given below, you’ll discover a range of such descriptive words that start with O.
Let us talk about the letter O a little bit. O, or o, is the fifteenth letter in the ISO basic Latin alphabet and the fourth vowel letter in the modern English alphabet. It is the one of the most commonly used letter in the English language this is why you can expect the list of adjectives that start with O to be a broad one.
Without making you wait any further, let us dive into the list of adjectives that start with O given below. To obtain the intended results, you must master the technique of using these adjectives beginning with O into your own statements and utterances.
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Adjectives That Start with O You Always Use
Adjectives have the power of making our conversations fun and appealing. Following is a list of adjectives starting with O that we always use in our day-to-day lives.
1. Old
- Definition: having lived or existed for many years
- Synonyms: elderly, mature, aged
- Example: Mr. William is a very old man.
2. Orange
- Definition: a round sweet fruit that has a thick orange skin
- Synonyms: tangerine, coral, citrus
- Example: I drink orange juice every morning.
3. Odd
- Definition: strange or unexpected
- Synonyms: strange, peculiar, weird
- Example: Mr. Walcott behaves in a very odd manner.
4. Obvious
- Definition: easy to see, recognize, or understand
- Synonyms: clear, plain
- Example: It’s obvious that she doesn’t like cheap boys.
5. Oily
- Definition: consisting of or similar to oil
- Synonyms: greasy, fatty, buttery
- Example: My skin is super oily.
6. Off
- Definition: characterized by performing or feeling worse than usual
- Synonyms: bad, unpleasant
- Example: Even the greatest athletes have off days.
7. OK
- Definition: satisfactory but not especially good
- Synonyms: satisfactory, all right, fine
- Example: The flight was OK.
8. Opposite
- Definition: completely different
- Synonyms: antithetical, contradictory, reversed
- Example: Police attempts to calm the violence had the opposite effect.
9. Oral
- Definition: spoken and not written
- Synonyms: spoken, verbal
- Example: We have our oral viva on Monday.
10. Online
- Definition: connected by computer to one or more other computers or networks
- Synonyms: web based, electronic
- Example: I just had my online class.
Adjectives That Start with O You Usually Use
Following are some of the adjectives that start with the letter O that we usually use in our daily life routine. Try and get hold of as many of these adjectives as possible.
1. Only
- Definition: used to show that there is a single one or very few of something, or that there are no others
- Synonyms: solitary, lone, unique
- Example: I was the only person on the train.
2. Outdoor
- Definition: existing, happening, or done outside, rather than inside a building
- Synonyms: external, open air
- Example: We attended a huge outdoor concert last Friday.
3. Odorless
- Definition: without a smell
- Synonyms: unscented, unperfumed, inodorous
- Example: Hydrogen is a colorless, odorless gas.
4. Optimal
- Definition: the best or most effective possible in a particular situation
- Synonyms: optimized, maximum
- Example: This seems to be the optimal solution for the male.
5. Opposing
- Definition: in conflict or competition with someone or something
- Synonyms: rival, opposite, combatant
- Example: I’ve been asked to arbitrate between the opposing sides.
6. Open
- Definition: not closed or fastened
- Synonyms: unlocked, unbolted, unlatched
- Example: I left the container open by mistake.
7. Official
- Definition: relating to a position of responsibility
- Synonyms: ceremonial, formal
- Example: Sheela got my official account verified.
8. Offstage
- Definition: off the stage, or happening behind the stage
- Synonyms: backstage, annex
- Example: The main characters remained offstage for most of the second act.
9. Offensive
- Definition: causing offence
- Synonyms: insulting, rude, derogatory
- Example: Hadley told some really offensive jokes.
10. Occasional
- Definition: not happening or done often or regularly
- Synonyms: infrequent, intermittent, irregular
- Example: Luis plays the occasional game of tennis.
Adjectives That Start with O You Often Use
Following is a list of adjectives with letter O that we often use in our daily lives. This list also contains some of the adjectives that start with O for a person. By utilizing these adjectives you will be able to send your message across in an interesting and compelling fashion.
1. Outrageous
- Definition: shocking and unacceptable
- Synonyms: shocking, scandalous
- Example: Cars prices these days are just outrageous.
2. Observable
- Definition: things that can be noticed or seen
- Synonyms: noticeable, visible, perceptible
- Example: Liam’s motives are never directly observable.
3. Obsessive
- Definition: doing something, too much or all the time
- Synonyms: compulsive, dominating
- Example: Our principal is obsessive about punctuality.
4. Optional
- Definition: available to be chosen but not obligatory
- Synonyms: voluntary, non-compulsory
- Example: English is compulsory for all students, but art and music are optional.
5. Ongoing
- Definition: continuing to exist or develop, or happening at the present moment
- Synonyms: in progress, continuing, current
- Example: Our final project is ongoing.
6. Oncoming
- Definition: moving towards you or coming nearer
- Synonyms: approaching, advancing, coming
- Example: A car was struck by an oncoming vehicle.
7. Optical
- Definition: relating to light or the ability to see
- Synonyms: discernible, observable, visual
- Example: Maria has an optical defect.
8. Occupied
- Definition: being used by someone
- Synonyms: tenanted, settled, inhibited
- Example: I spent two years in occupied Kashmir.
9. Opening
- Definition: coming at the beginning of something
- Synonyms: initial, starting
- Example: Hadley stole the show with her opening remarks.
10. Organic
- Definition: relating to or derived from living matter
- Synonyms: biological, natural
- Example: I use organic hair oil.
Adjectives That Start with O You Sometimes Use
We have discussed this thing at the start of this article that one of the primary functions of adjectives is giving description of different things. Following are some of the describing words beginning with O that will describe features of both people and objects around us.
1. Oppressive
- Definition: cruel and unfair
- Synonyms: harsh, cruel, brutal
- Example: The political situation has grown increasingly oppressive.
2. Odious
- Definition: extremely unpleasant
- Synonyms: repulsive, repellent
- Example: Malik is an odious person.
3. Opportune
- Definition: happening at a time that is likely to produce success or is convenient
- Synonyms: auspicious, propitious, favorable
- Example: Thomas couldn’t have arrived at a less opportune moment.
4. Opposable
- Definition: capable of facing and touching the other digits on the same hand
- Synonyms: facing, touching
- Example: Humans have an opposable thumb.
5. Offside
- Definition: (in football and hockey) in a position that is not allowed by the rules of the game, often in front of the ball
- Synonyms: out of line, fouled
- Example: Ronaldo looked a yard offside for his goal.
6. Offshore
- Definition: away from or at a distance from the coast
- Synonyms: coastal, alongshore
- Example: The wind was blowing offshore.
7. Omnivorous
- Definition: naturally able to eat both plants and meat
- Synonyms: all-devouring, predatory
- Example: Humans are omnivorous.
8. Offended
- Definition: upset and angry, often because someone has been rude
- Synonyms: upset, hurt, wounded
- Example: Cecilia sounded rather offended.
9. Orthopedic
- Definition: relating to the branch of medicine dealing with the correction of deformities of bones or muscles
- Synonyms: orthopedical, orthotic
- Example: My uncle is an orthopedic surgeon.
10. Organizational
- Definition: relating to the planning of an activity or event
- Synonyms: supervisory, directorial, ministerial
- Example: I am looking for an assistant with organizational skills.
Adjectives That Start with O You Occasionally Use
Adjectives help us visualize, describe, define, or explain information about people, places, things, situations, or actions. Following are some of the adjective words that start with O that we use occasionally.
1. Obscene
- Definition: offensive, rude, or shocking
- Synonyms: filthy, indecent
- Example: The blackmailer was jailed for making obscene phone calls.
2. Objectionable
- Definition: arousing distaste or opposition
- Synonyms: offensive, unpleasant, disagreeable
- Example: The violence in the film is objectionable.
3. Obscure
- Definition: not known to many people
- Synonyms: unclear, uncertain, unknown
- Example: Lionel’s answers were obscure and confusing.
4. Observant
- Definition: quick to notice or perceive things
- Synonyms: alert, sharp
- Example: Naila’s observant eye took in every detail.
5. Obsolete
- Definition: not in use any more
- Synonyms: outdated, outmoded
- Example: Gas lamps became obsolete when electric lighting was invented.
6. Obtuse
- Definition: annoyingly insensitive or slow to understand
- Synonyms: stupid, dull, slow-witted
- Example: George wondered if the doctor was being deliberately obtuse.
7. Offbeat
- Definition: unusual and strange
- Synonyms: unconventional, unorthodox
- Example: Aliya has an offbeat sense of humor.
8. Opaque
- Definition: not able to be seen through; not transparent
- Synonyms: cloudy, non-transparent, blurred
- Example: The bottles were filled with a pale opaque liquid.
9. Opulent
- Definition: expensive and luxurious
- Synonyms: lavish, deluxe
- Example: We stayed at an opulent hotel.
10. Outlandish
- Definition: strange and unusual and difficult to accept or like
- Synonyms: weird, queer, offbeat
- Example: Madilyn liked to dress in outlandish clothes.
Adjectives That Start with O You Seldom Use
Following are some O adjectives that people seldom come across in their lives. Using these adjectives in your daily talks will help you build for yourself an excellent rapport among your friends and colleagues.
1. Omnipotent
- Definition: having unlimited power and able to do anything
- Synonyms: all-powerful, almighty, supreme
- Example: God is the ultimate omnipotent.
2. Omnipresent
- Definition: present or having an effect everywhere at the same time
- Synonyms: general, universal
- Example: The singer became an omnipresent icon of style and beauty.
3. Oafish
- Definition: stupid, rude, or awkward
- Synonyms: stupid, foolish, idiotic
- Example: Eliza is an oafish lass.
4. Oblique
- Definition: not expressed or done in a direct way
- Synonyms: indirect, inexplicit
- Example: Noman gave her an oblique glance.
5. Omniscient
- Definition: having or seeming to have unlimited knowledge
- Synonyms: all-knowing, all-wise
- Example: God is omniscient.
6. Obsequious
- Definition: too eager to praise or obey someone
- Synonyms: servile, ingratiating, unctuous
- Example: Isabelle is embarrassingly obsequious to anyone in authority.
7. Obstructive
- Definition: trying to stop someone from doing something by causing problems for them
- Synonyms: unhelpful, uncooperative
- Example: Jean had been so obstructive.
8. Occidental
- Definition: relating to the western part of the world, especially the countries of Europe and America
- Synonyms: Anglo-American, continental
- Example: The music is a mix of occidental pop and Latin sensuality.
9. Omnifarious
- Definition: comprising or relating to all sorts or varieties
- Synonyms: different, varied
- Example: The views of passengers travelling on the Russian omnibus these days are omnifarious.
10. Ontological
- Definition: relating to the branch of metaphysics dealing with the nature of being
- Synonyms: existential, metaphysical
- Example: Professor indulged his students into ontological arguments.
Positive Adjectives That Start with O
Following are some of the positive adjectives that start with H. If you want to make a positive impression in front of people, memorize this list of adjectives that start with O.
1. Objective
- Definition: not influenced by personal feelings or opinions in considering and representing facts
- Synonyms: impartial, unbiased
- Example: Historians try to be objective and impartial.
2. Original
- Definition: existing since the beginning, or being the earliest form of something
- Synonyms: authentic, genuine, actual
- Example: Who was the original owner of this house?
3. Organized
- Definition: arranged according to a particular system
- Synonyms: coordinated, formulated, standardized
- Example: The letters had been placed in organized fashion.
4. Ornamental
- Definition: beautiful rather than useful
- Synonyms: decorative, fancy, ornate
- Example: The handles on each side of the box are purely ornamental.
5. Outstanding
- Definition: clearly very much better than what is usual
- Synonyms: excellent, magnificent
- Example: Jennifer’s dance performance was amazing.
6. Obliging
- Definition: willing or eager to help
- Synonyms: accommodating, willing
- Example: Jasper found an obliging doctor who gave him the drugs he needed.
7. Optimistic
- Definition: hoping or believing that good things will happen in the future
- Synonyms: positive, confident, hopeful
- Example: Zahra is optimistic about her chances of winning a gold medal.
8. Open-hearted
- Definition: kind, loving, and honest
- Synonyms: honest, loving
- Example: They gave us an open-hearted welcome.
9. Open-handed
- Definition: generous
- Synonyms: generous, magnanimous, charitable
- Example: Martha’s a very open-handed, generous person.
10. Open-minded
- Definition: willing to consider ideas and opinions that are new or different to your own
- Synonyms: observant, broad-minded, interested
- Example: Doctors these days tend to be more open-minded about alternative medicine.
Adjectives That Start with O to Describe a Person
Following is a list of adjectives that start with O to describe a person. Adjectives are employed on a large scale to specify both good and bad aspects of people. Now let’s go through the following list of O adjectives to describe a person.
1. Obedient
- Definition: doing, or willing to do, what you have been told to do by someone in authority
- Synonyms: compliant, acquiescent, tractable
- Example: Students are expected to be obedient in the classroom.
2. Obese
- Definition: extremely fat in a way that is dangerous for health
- Synonyms: fat, overweight, corpulent
- Example: I saw a hugely obese young man yesterday.
3. Ordinary
- Definition: not different or special or unexpected in any way; usual
- Synonyms: mundane, mediocre, common
- Example: Ordinary families cannot afford to hire servants.
4. Outspoken
- Definition: expressing strong opinions very directly without worrying if other people are offended
- Synonyms: forthright, direct, candid
- Example: Mr. Jack is an outspoken critic of the present government.
5. Olympian
- Definition: relating to the ancient or modern Olympic Games
- Synonyms: Olympic
- Example: He was an Olympian champion.
6. Obnoxious
- Definition: very unpleasant or rude
- Synonyms: unpleasant, disagreeable
- Example: Jenny talked in a very obnoxious way.
7. Old-fashioned
- Definition: not modern; belonging to or typical of a time in the past
- Synonyms: obsolete, ancient, antiquated
- Example: Elizabeth is very old-fashioned in her outlook.
8. Ostentatious
- Definition: too obviously showing your money, possessions, or power, in an attempt to make other people notice and admire you
- Synonyms: showy, pretentious, conspicuous
- Example: Now he is a senior, and gets more ostentatious.
9. Orthodox
- Definition: (of beliefs or ideas) considered traditional, normal, and acceptable by most people
- Synonyms: conservative, traditional, observant
- Example: Most orthodox doctors however dismiss this as complete nonsense.
10. Obstinate
- Definition: unreasonably determined
- Synonyms: stubborn, headstrong, willful
- Example: Sean can be very obstinate at times.
Adjectives That Start with O – Full List (374 Words)
Now that you’ve mastered the skill of incorporating all of the words from the list of adjectives that start with O into sentences, we’ll list them all and more here. This will be a sort of revision for you.
- Orange
- One
- Octangular
- Olive
- Orthogonal
- Overcritical
- Oaten
- Omniscient
- Opposing
- Opaline
- Ownerless
- Operating
- Overgrown
- Opencut
- Obligate
- Overshot
- Oppressive
- Overburdened
- Olympic
- Overhand
- Openmouthed
- Ovoviviparous
- Originative
- Offended
- Offish
- Overpowering
- Ossiferous
- Omnipresent
- Onerous
- Opinionated
- Ominous
- Outspread
- Oldline
- Otherwise
- Overripe
- Outer
- Overexcited
- Outstretched
- Ossiculate
- Ocellated
- Overanxious
- Obliterable
- Outrageous
- Outward
- Oblate
- Organismic
- Overweight
- Orthoptic
- Odourless
- Obstinate
- Own
- Owlish
- Overemotional
- Oversensitive
- Overabundant
- Ocher
- Oversize
- Occidental
- Other
- Obstetrical
- Ordinary
- Obstructive
- Oceangoing
- Olden
- Oncologic
- Ocular
- Oxidative
- Oval
- Outermost
- Operculated
- Oecumenical
- Ornery
- Outlandish
- Overfull
- Ovine
- Olivelike
- Otic
- Ovoid
- Oily
- Offensive
- Orthostatic
- Overgreedy
- Orientated
- Obscene
- Ostensive
- Offhanded
- Onside
- Opprobrious
- Oceanic
- Organizational
- Organicistic
- Ochre
- Overbusy
- Obligated
- Organized
- Overmuch
- Operative
- Outflowing
- Oblanceolate
- Overstrung
- Outside
- Offbeat
- Outsized
- Obtuse
- Outboard
- Off
- Outlawed
- Opening
- Obsequious
- Oriental
- Ongoing
- Opalescent
- Occluded
- Orotund
- Overenthusiastic
- Octogenarian
- Oblong
- Overmodest
- Otiose
- Orphaned
- Odorous
- Orgiastic
- Overproud
- Overstuffed
- Official
- Overrated
- Otherworldly
- Ornamental
- Overcareful
- Overcautious
- Outdoor
- Opponent
- Overbearing
- Outrigged
- Octagonal
- Optimal
- Optative
- Opaque
- Orthomolecular
- Overprotective
- Oriented
- Omissive
- Overwrought
- Obliterated
- Orderly
- Oneiric
- Obvious
- Occupational
- Outright
- Outbound
- Oleaginous
- Ordered
- Offside
- Obnoxious
- Outstanding
- Overqualified
- Oblique
- Obtrusive
- Obstructed
- Oncoming
- Opportune
- Omnipotent
- Oversized
- Oxidizable
- Overheated
- Occipital
- Ophthalmic
- Oropharyngeal
- Orbiculate
- Obsolete
- Overactive
- Overjoyed
- Observable
- Overt
- Oversubscribed
- Overoptimistic
- Overnight
- Omani
- Overcurious
- Overwhelmed
- Owned
- Occasional
- Overrefined
- Overcast
- Ossified
- Occupied
- Outcaste
- Overlying
- Opposable
- Overindulgent
- Original
- Outmoded
- Ohmic
- Oviform
- Ottoman
- Omnifarious
- Orbicular
- Oversea
- Osseous
- Oblivious
- Outmost
- Outgoing
- Open-minded
- Oaken
- Organismal
- Oversuspicious
- Orthotropous
- Obtainable
- Oleophilic
- Open
- Obscure
- Overbold
- Outcast
- Obovate
- Oldish
- Ordained
- OK
- Occurrent
- Orthopedical
- Onshore
- Oleaceous
- Openhanded
- Oddish
- Owing
- Operculate
- Oleophobic
- Operational
- Overserious
- Orwellian
- Openhearted
- Operable
- Observing
- Optional
- Organisational
- Outlaw
- Osteal
- Oversewn
- Optimum
- Ostentatious
- Occlusive
- Olfactory
- Orthodox
- Overdressed
- Overdue
- Overcrowded
- Obsessive
- Orbital
- Overdelicate
- Open-handed
- Overcooked
- Overjealous
- Optimistic
- Octosyllabic
- Oscine
- Outlying
- Officious
- Orthopaedic
- Orbitual
- Only
- Oviparous
- Over
- Opposed
- Overambitious
- Organised
- Optic
- Opulent
- Observant
- Obligatory
- Old
- Ordinal
- Odoriferous
- Overzealous
- Oratorical
- Overfed
- Obliging
- Oscitant
- Oxidised
- Obese
- Overland
- Orangish
- Objectionable
- Odiferous
- Odious
- Overcredulous
- Opposite
- Offenseless
- Ostensible
- Overhanded
- Overwhelming
- Overaggressive
- Olfactive
- Obsessional
- Overfamiliar
- Operant
- Oral
- Overseas
- Overfond
- Overall
- Ototoxic
- Octal
- Overladen
- Oecumenic
- Obstetric
- Opportunistic
- Optical
- Objective
- Omnibus
- Onymous
- Obligational
- Ovarian
- Old-fashioned
- Opencast
- Offhand
- Occult
- Overworked
- Omnivorous
- Obstreperous
- Online
- Onstage
- Outbred
- Ontological
- Ovate
- Operose
- Orchestral
- Oversolicitous
- Overnice
- Obliterate
- Obdurate
- Odd
- Obedient
- Oafish
- Onetime
- Ornate
- Overconfident
- Overhead
- Outraged
- Octuple
- Outspoken
- Overgenerous
- Overblown
- Outclassed
- Ontogenetic
- Overpriced
- Offstage
- Overaged
- Oligarchic
- Offshore
- Omissible
- Obsolescent
- Ornithological
- Outdated
- Oversexed
- Overweening
- Oozy
- Overlarge
- Opinionative
- Ossicular
- Oppositive
- Open-hearted
- Olympian
- Odorless
- Outre
- Observational
- Organic
- Oracular
- Overarm
- Onomastic
- Orphic
- Omnidirectional
- Outback
- Overhasty
- Operatic
- Overvaliant
- Orthopedic
Final Thoughts on Adjectives That Start with O
Thank you for going through this article on adjectives that start with O. It is hoped that you must have understood the importance of adjectives in our everyday talks by now. What you can do now is that you can incorporate these adjectives starting with O into your own phrases, clauses, and sentences and see how they modify them.
Using adjectives in our talks means that we can express the quality of any person or object around us. The descriptive words that start with O given above also do the same thing.
Now that you have learned these adjectives that start with O, it’s time to add new adjectives to the above given list. Your talks and writings will get much more interesting and fun if you will have a variety of adjectives up your sleeve.
