English Words: O
1,431 words · Page 16 of 29
A Protestant, especially one that is a member of the Protestant unionist community of Northern Ireland.
An arboreal ape, characterised by their shaggy reddish-brown coat and long arms, which comprise the genus Pongo, native to Borneo and Sumatra.
A musical composition, often based on a religious theme; similar to opera but with no costume, scenery or acting.
Of or relating to, or forming an orbit (such as the orbit of a moon, planet, or spacecraft).
An object that orbits another, especially a spacecraft that orbits a planet etc. without landing on it.
A sea mammal (Orcinus orca) related to dolphins and porpoises, commonly called the killer whale.
A large group of musicians who play together on various instruments, usually including some from strings, woodwind, brass and/or percussion; the instruments played by such a group.
A plant of the orchid family (Orchidaceae), bearing unusually-shaped flowers of beautiful colours.
A trial in which the accused was subjected to a dangerous test (such as ducking in water), divine authority deciding the guilt of the accused.
The second of the two terms by which a point is referred to, in a system of fixed rectilinear coordinate (Cartesian coordinate) axes.
A musical phrase constructed from one or more statements of one modal pattern and ending in a rest.
Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago.
Rock or other material that contains valuable or utilitarian materials; primarily a rock containing metals or gems for which it is typically mined and processed.
A state in the Pacific Northwest region of the United States. Capital: Salem. Largest city: Portland.
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 16. 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.