English Words: O

1,431 words · Page 12 of 29

ondenoun

envy; hatred; malice

Ondoname

A surname from Hungarian.

onenum

The number represented by the Arabic numeral 1; the numerical value equal to that cardinal number.

one'sdet

Belonging to one.

Oneidanoun

A member of a tribe of Native Americans formerly inhabiting the region near Oneida Lake in New York, now often found in modern New York, Wisconsin, or Canada.

onenessnoun

The state of being one or undivided; unity.

onerousadj

Imposing or constituting a physical, mental, or figurative load which can be borne only with effort; burdensome.

onesnoun

plural of one

oneselfpron

A person's self: general form of himself, herself, themself or yourself.

onesienoun

Any of various one-piece attires

onesiesnoun

A call in any children's game, such as jacks, where one action must be performed.

onetimeadj

Alternative form of one-time (“former; past”).

ONGadv

Abbreviation of on God.

ongoingadj

Continuing, permanent, lasting.

oninoun

A Japanese evil spirit or demon.

onionnoun

A monocotyledonous plant (Allium cepa), allied to garlic, used as vegetable and spice.

onionsnoun

plural of onion

Onitshaname

A city in Anambra State, Nigeria, located on the eastern bank of the Niger river.

onlineadj

Of a system: connected (generally electrically) to a larger network.

onlookernoun

A spectator; someone looks on or watches, without becoming involved or participating.

onlyadj

Alone in a category.

onnacontraction

On the.

onophrase

Abbreviation of or near(est) offer.

onomatopoeianoun

The property of a word that sounds like what it represents.

Onondaganoun

A member of a Native American tribe originally inhabiting Onondaga County, New York.

Onsname

A female given name from Arabic.

onscreenadj

As seen on a screen (as of television, film, or computer) rather than in real life.

onsennoun

A (Japanese) hot spring.

onsetnoun

The initial phase of a disease or condition, in which symptoms first become apparent.

onshoreadj

Moving from the sea towards the land.

onsideadj

Not in an offside position; In the part of the playing area where one can legally play the ball, puck, etc.

onsiteadj

On or at a site.

onslaughtnoun

A fierce attack.

Onslowname

A male given name from the Germanic languages.

onstageadj

On the part of a stage that is visible to the audience.

Ontarioname

A province in eastern Canada. Capital: Toronto.

ontoprep

Arriving upon or on top of (speaking of a physical or metaphorical movement).

ontologicaladj

Of or relating to ontology.

ontologiesnoun

plural of ontology

ontologynoun

The branch of metaphysics that addresses the nature or essential characteristics of being and of things that exist; the study of being qua being.

ontopprep

Misspelling of on top.

onusnoun

A legal obligation.

onwardadj

Moving forward.

onwardsadv

Onward.

onyxnoun

A banded variety of chalcedony, a cryptocrystalline form of quartz.

oonoun

(Ω, ω) The Greek letter omega.

OOCadj

Initialism of out of character.

oocytenoun

A cell that develops into an egg or ovum; a female gametocyte.

oodlesnoun

unspecified large amount, number, or quantity; lots, tons.

oofintj

A sound mimicking the loss of air, as if someone's solar plexus had just been struck.

Spelling & Dictionary Insight

The English alphabetical index for the letter O contains 1,431 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 29 pages, and you are currently viewing page 12. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.

On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.

For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "O" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.