In the English language, the letter 'O' is the fourth most used vowel and the fifth most commonly used letter overall. However, it might not be as easy to think of words that start with 'O'. This article is designed to guide you through a collection of words that begin with the letter 'O'. Let's embark on this linguistic journey.
Words That Start with O | Nouns, Verbs, Adjectives & Common Words
Last Updated on Jul 31, 2023
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Words Beginning with O
The following sections contain lists of different types of words that start with 'O', including nouns , verbs , adjectives , phrasal verbs , commonly used words, and words that contain double 'O's.
25 Nouns That Begin with O
- Octopus
- Olive
- Opera
- Ostrich
- Oak
- Opulence
- Opportunity
- Outlet
- Optics
- Orbit
- Omen
- Opal
- Oyster
- Ozone
- Outcast
- Oracle
- Oxide
- Obelisk
- Osmosis
- Oasis
- Opium
- Overture
- Obstacle
- Obelisk
- Orphan
25 Verbs That Begin with O
- Observe
- Obliterate
- Overcome
- Optimize
- Offend
- Overlook
- Oscillate
- Overwhelm
- Oppress
- Originate
- Overpower
- Overindulge
- Overproduce
- Overestimate
- Outperform
- Outsource
- Outfit
- Overload
- Outlive
- Outgrow
- Overheat
- Overstate
- Overrate
- Ooze
- Oust
25 Adjectives That Begin with O
- Outstanding
- Opulent
- Overbearing
- Outrageous
- Optimistic
- Obnoxious
- Obscure
- Outlandish
- Overwhelming
- Opaque
- Obedient
- Overjoyed
- Overused
- Overexcited
- Overrated
- Ornate
- Obsolete
- Outspoken
- Organic
- Overdue
- Outgoing
- Overt
- Overprotective
- Original
- Oblivious
- Outrageous
25 Commonly Used Words That Start with O
- Over
- Outside
- Only
- Often
- Open
- Off
- Old
- Out
- Once
- Own
- One
- Overhead
- Opposite
- Omit
- Observe
- Obtain
- Operate
- Opt
- Offer
- Overcome
- Occupy
- Owe
- Order
- Outfit
- Ogle
- Ooze
Phrasal Verbs That Begin with O
- Opt out
- Open up
- Own up
- Overdo
- Overcome
- Overlook
- Overestimate
- Overreact
Words with Double O's
- Moon
- Book
- Cool
- Room
- Pool
- Spoon
- Loop
- Wood
- Cook
- Stool
- Good
- Boost
- Wool
- Mood
- Zoo
More Articles for English Grammar
Frequently Asked Questions
List 10 words that start with ‘O’.
Owl, Oil, Opt, Orbit, Occur, Optional, Occasion, Opposite, Operational, Observation
List 10 action words that start with ‘O’.
Oil, Own, Opt, Obstruct, Offer, Overreact, Opinionate, Oppose, Occupy, Orchestrate
List 5 words with double Os.
Too, Soon, Boot, Root, Shoot
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