English Words: O
15,494 words · Page 310 of 310
A device that converts oxygen into ozone, normally by means of a silent electrical discharge; an ozone generator.
Any reaction with ozone, especially to a double bond, in which cleavage of a bond occurs.
A layer in part of the stratosphere that has a larger than normal concentration of ozone; the ozone layer.
The opening of a defensive gland present in some arthropods, which secretes a foul-smelling substance to discourage predators.
A genre of low-budget films produced in Australia, chiefly during the 1970s and 1980s.
Suggesting or pertaining to Shelley's Ozymandias, a proud king whose empire and memory have long since crumbled into obscurity.
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 310. 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 44 of 44 entries carry a part-of-speech tag and 44 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.