English Words: O
15,494 words · Page 145 of 310
An obsession with orchids; enthusiasm for raising or collecting orchids, especially in the Victorian era.
A commune in the département of Nord, in the region of Hauts-de-France, in France, near its border with Belgium.
A procedure for fixation of a testis, often to move an undescended testicle into the scrotum and keep it there.
A river in Argyll and Bute council area, in the Highlands of Scotland, which flows from Loch Tulla to Loch Awe.
The organic compound 3,5-dihydroxytoluene, found in many lichens and synthesizable from toluene.
A natural phenolic organic compound that occurs in many species of lichen, used in the production of orcein and as a reagent in some chemical tests for pentoses
Any of a family of crustacean peptides that elicit potent myotropic effects in gut tissues
A headland (Ord Point) and high granite mass in Caithness, Highland council area, Scotland (OS grid ND0517).
A political and military organizational structure used by Turkic and Mongol peoples, sometimes referred to as a horde.
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 145. 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.