English Words: O
15,494 words · Page 144 of 310
A sea mammal (Orcinus orca) related to dolphins and porpoises, commonly called the killer whale.
a dye, related to litmus, that is extracted from the lichen Rocella tinctoria; used as a microscopic stain and as a food colouring
An enhanced form of choreography that includes details of the music to accompany the dance
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 sunken area in front of a stage in which musicians, largely hidden from view, play music to accompany stage performances.
A player organ designed to mimic the sound of an orchestra, manufactured and used from the late 19th century to early 20th century.
A mechanical multiple musical instrument designed to sound like an orchestra or band.
A plant of the orchid family (Orchidaceae), bearing unusually-shaped flowers of beautiful colours.
An island of Taitung County, Taiwan, in the Pacific Ocean (Philippine Sea), home of the Tao (Yami) indigenous people.
Spelling & Dictionary Insight
The English alphabetical index for the letter O contains 15,494 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 310 pages, and you are currently viewing page 144. 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.