Random words starting with O

452 English words begin with O in our list, 190 of them common. Generate a few at random, each with its meaning.

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Words starting with O: 24 examples

A fixed sample from our list, in alphabetical order. Use the generator above for a fresh random set.

  • observatory nounA building designed and equipped to observe astronomical phenomena.
  • observer nounA person who becomes aware (of things or events) through the senses.
  • obstruction nounAny structure that makes progress difficult.
  • occupation nounThe principal activity in your life that you do to earn money.
  • occupy verbKeep busy with.
  • odds nounThe likelihood of a thing occurring rather than not occurring.
  • offender nounA person who transgresses moral or civil law.
  • ominous adjectiveThreatening or foreshadowing evil or tragic developments.
  • operative adjectiveBeing in force or having or exerting force.
  • oral adjectiveUsing speech rather than writing.
  • orbital adjectiveOf or relating to an orbit.
  • ordeal nounA severe or trying experience.
  • orderly adjectiveDevoid of violence or disruption.
  • ordination nounThe status of being ordained to a sacred office.
  • ore nounA mineral that contains metal that is valuable enough to be mined.
  • organisation nounThe persons (or committees or departments etc.) who make up a body for the purpose of administering something.
  • outdated adjectiveOld; no longer valid or fashionable.
  • outlook nounA habitual or characteristic mental attitude that determines how you will interpret and respond to situations.
  • outright adverbWithout restrictions or stipulations or further payments.
  • outside adjectiveRelating to or being on or near the outer side or limit.
  • outward adjectiveRelating to physical reality rather than with thoughts or the mind.
  • oven nounKitchen appliance used for baking or roasting.
  • overall adjectiveInvolving only main features.
  • owl nounNocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes.

O by the numbers

2.4% of the words in our list start with O. Of the common ones, 96 are nouns, 49 adjectives, 28 verbs and 17 adverbs.

All words starting with O452
Common words190
Nouns / adjectives / verbs / adverbs (common)96 / 49 / 28 / 17

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Frequently asked questions

How many words start with O?
Our list has 452 words that start with O, and 190 of them are common in everyday English. Plurals and verb forms like "-ed" and "-ing" are not counted separately.
Where do the words and meanings come from?
The meanings and example sentences come from WordNet, the free English dictionary database from Princeton University. Word frequency comes from the open wordfreq project, and syllable counts from the CMU Pronouncing Dictionary. See how it works.
Is it really random?
Yes. Words are picked with your browser's secure random number generator (the Web Crypto API), and one batch never repeats a word.
Is it suitable for kids and classrooms?
Yes. We removed swear words, slurs and adult terms from the whole list, so it is safe to use with children and on a projector.