Words that Start With O

Words that Start With O! In this lesson, you will learn a list of commonly used words starting with O in English with ESL pictures to help you enhance your English vocabulary.

Table of Contents

O Words | List 1

Optimism
Oasis
Oath
Obcordate
Obedience
Obedient
Obediently
Obeisance
Obey
Objective
Objectively
Obligation
Oblige
Obliged
Obliging
Obligingly
Observance
Observant
Observe
Obtain
Obtainable
Obviousness
Occasion
Occur
Odds-on
Offer
Offering
Official
Ok
Okay
Okayed
Okey-dokey
Olympiad
Olympian
Omnipotent
Omnipresent
Omniscience
Omniscient
On
On-time
On-board
Oncoming
One
One-liner
Oneness
Ongoing
On-hand
On-target
On-the-ball
On-the-beam
On-the-button
On-the-money
Onward
Onwards
Oodles
Oohlala
Oomph
Ooze
Oozing
Opalescent
Open
Open up
Open-handed
Open-hearted
Open-heartedly
Opening
Openly
Open-mind
Open-minded
Openness
Operable
Operatic
Operational
Operative
Opportune
Opportunities
Opportunity
Optimal
Optimist
Optimistic
Optimum
Option
Opulence
Opulent
Oracy
Orator
Orchestrated
Order
Orderly
Organic
Organization
Organizational
Organized
Orgasmic
Orientation
Oriented
Original
Originality
Originate
Origination
Originative
Ornament
Ornamental
Ornate
Orotund
Oscar
Oscular
Osculate
Outback
Outbalance
Outbrave
Outclass
Outdance
Outdistance
Outdo
Outdone
Outdrive
Outface
Outfly
Outgoing
Outlast
Out-of-this-world
Outperform
Outperformed
Outperforming
Outplay
Outpoint
Outrace
Outrageous
Outrank
Outright
Outsail
Outscore
Outshine
Outshone
Outsize
Outsmart
Outspoken

O Words | List 2

Outsprint
Outstanding
Outstandingly
Outstretch
Outstrip
Outthink
Outwit
Ovation
Over
Overachieve
Overachiever
Overactive
Overage
Overbold
Overbrimming
Overcome
Overexcited
Overflow
Overflowing
Overfond
Overjoy
Overjoyed
Over-joyful
Overjoying
Overmodest
Overpower
Overriding
Oversize
Overt
Overtake
Overtaken
Overtaking
Overture
Overwhelming
Owner
Object
Obligated
Obscure
Observation
Observatory
Obsolete
Obstacle
Obvious
Obviously
Occasional
Occasionally
Occupation
Occupy
Occurred
Occurrence
Ocean
October
Oddly
Offense
Offensive
Office
Officer
Officially
Offline
Offset
Offshoot
Offshore
Older
Oldest
Olive
Olympic
Online
Onscreen
Onslaught
Onstage
Operate
Operation
Operator
Opinion
Opponent
Oppose
Opposite
Opposition
Optic
Optical
Optimization
Optimize
Optional
Or
Oral
Orange
Orbit
Orbital
Ordinary
Organ
Organisation
Organize
Origin
Originally
Ostensibly
Otherwise
Ought
Outage
Outbreak
Outcome
Outdated
Outdoor
Outfit
Outfitted
Outline
Outlook
Output
Outsource
Outweigh
Oven
Overall
Overhaul
Overhead
Overlap
Overlay
Overly
Overnight
Override
Overrun
Oversaw
Oversee
Overseen
Oversight
Overthrow
Overtime
Overturn
Overview
Overweight
Owed
Owned
Ownership
Owning
Oxygen
Owlish
Oviparous
Overwrought
Overwhelmed
Oversensitive
Overrated
Overconfident
Overblown
Ovate
Ovarian

O Words | List 3

Oval
Outside
Outlandish
Outermost
Outer
Outbound
Otiose
Ostentatious
Ostensible
Ossified
Ornery
Orgiastic
Organdy
Oppressive
Opinionated
Operating
Open-ended
Opaque
Onerous
Omnivorous
Ominous
Olfactory
Old-fashioned
Olden
Old
Oily
Offhand
Offbeat
Odoriferous
Odious
Odd
Ocular
Octogenarian
Octagonal
Oceanic
Occupied
Occlusive
Occipital
Occidental
Obtuse
Obstinate
Obsessive
Obsessed
Obsequious
Obscene
Obnoxious
Oblong
Oblique
Oblate
Objectionable
Obese
Obeisant
Obdurate
Oaten
Oafish

Learn more about list of words that start with n in English.

Words that Start with O | Examples

He was very respectful at home and obedient to his parents.
Try to be objective if you want to spend your money wisely.
Facts can be established by observation and experiment.
The role of scientists is to observe and describe the world, not to try to control it.
The police are trying to obtain a more accurate picture of crime levels.
Men were standing around, swilling beer and occasionally leering at passing females.
The highest spring tides of the year occur after the equinoxes in March and September.
The students return in October for the start of the new academic year.
There have been several retirements in my office recently.
Most software programs allow you to compose emails offline.
The older generation prefer a darker and more traditional kind of clothing.
In desperation, Mrs. Jones submitted to an operation on her right knee to relieve the pain.
You must avail yourself of every opportunity to speak English.
We will lay stress on industrial structure optimization while using FDI.
The well-known singer was accompanied at the electronic organ by his school teacher.
The organization is ever vigilant for threats to the habitats of birds.
Tableware for outdoor use should ideally be unbreakable.
The overall cost of the exhibition was ￡400,000.
To make a lasting marriage we have to overcome self-centeredness.
That city has decided to do away with overhead wires.
The welfare of a child should always override the wishes of its parents.
We’ve just appointed a coordinator who will oversee the whole project.
Pulling out to overtake, the car collided head-on with a van.
The document provides a general overview of the bank’s policies.
She said insensitive things to the overweight woman.
The owner has offered a reward for the recovery of the stolen goods.

Words that Start with O | Infographic

Words that Start with O | Infographic 1

Words that Start With O | List of 330+ Popular O Words in English

Words that Start with O | Infographic 2