English Words: O
15,494 words · Page 55 of 310
Acronym of Office of Water Services, a regulatory body responsible for the water industry in England and Wales.
Initialism of older father's sister's daughter; father's sister's daughter older than oneself.
The chemical element (symbol Og) with atomic number 118. It is the heaviest known element. Highly radioactive, it does not occur naturally. Originally expected to be a noble gas, it is now predicted to be a reactive metallic solid, and a semiconductor or a post-transition metal.
Initialism of Old God Baby; a conditional character conceived through the Dark Ritual in Dragon Age: Origins, or any character theorized by fans to have had a similar conception.
A fraternal institution indigenous to the Yoruba-speaking polities of Nigeria, Benin and Togo, as well as among the Edo people. It performs a range of political, religious and judicial functions.
An X-linked disorder of infancy with distinctive craniofacial features producing an aged appearance, growth failure, hypotonia, global developmental delays, cryptorchidism, and spontaneous cardiac arrhythmias.
An approach which extends hyperelastic material models to allow for the Mullins effect.
An orthorhombic-dipyramidal mineral containing arsenic, calcium, hydrogen, iron, manganese, oxygen, and zinc.
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 55. 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.