English Words: O
15,494 words · Page 151 of 310
A large criminal organization, or a group of such organizations, that deals in illegal goods and services.
any organometallic compound of an actinide, especially one having an unusually high coordination number
A chemical compound or functional group containing carbon (“organic”) atoms and group 16/chalcogen atoms, but not necessarily exclusively, which are also organic compounds. (ie. carbon dioxide, amongst others, is inorganic, thus not an organochalogen)
Describing a chlorinated organic compound, especially such a pesticide or other pollutant.
Any of very many chlorine substituted organic compounds, many of which are solvents or insecticides etc.
An organically modified phyllosilicate, derived from a naturally occurring clay mineral.
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 151. 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.