English Words: O
1,431 words · Page 20 of 29
The net movement of solvent molecules, usually water, from a region of lower solute concentration to a region of higher solute concentration through a partially permeable membrane.
A bird of prey of genus Pandion that feeds on fish and has white underparts and long, narrow wings each ending in four finger-like extensions.
An ethnolinguistic region on the border of Europe and Asia, located on both sides of the Greater Caucasus Mountains, largely inhabited by the Ossetians. The northern part of the region forms North Ossetia-Alania federal subject of Russia. The southern part is South Ossetia.
Having undergone the process of ossification (transformation into bone or a bone-like mass).
Seemingly, apparently, on the surface; supposedly, according to representations or implications made by someone (especially when their motives are suspected by others).
A form of arthritis, affecting mainly older people, caused by chronic degeneration of the cartilage and synovial membrane of the joints, leading to pain and stiffness.
A non-physician healthcare practitioner who practices osteopathy by manipulating the skeleton and muscles. Not to be confused with Doctors of Osteopathic Medicine (D.O.) (also known as osteopathic physicians) who are full physicians like Doctors of Medicine (M.D.).
A disease, occurring especially in women following menopause, in which the bones become extremely porous and are subject to fracture.
In ancient Athens (and some other cities), the temporary banishment by popular vote of a citizen considered dangerous to the state.
A town and civil parish with a town council in north-west Shropshire, England (OS grid ref SJ2929).
One with an obsessive interest in something, particularly (originally derogatory) an obsessive Japanese fan of anime or manga.
Initialism of out-the-front, telescoping, describing a knife or sword which extends and retracts through a hole in one end of the handle, rather than folding (or having a fixed blade).
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 20. 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.