English Words: O
15,494 words · Page 70 of 310
Nerium oleander, a notoriously poisonous shrub in the dogbane family, Apocynaceae, but nonetheless widely grown as an ornamental, having leathery lance-shaped leaves and deep rose-colored or white flowers.
The nitrile formally derived from oleic acid by replacement of the -COOH group by -CN
The pentacyclic triterpenoid carboxylic acid 3-oxoolean-12-en-28-oic acid, isolated from Pistacia, that inhibits leukotriene synthesis and has antiinflammatory activity
Any of a class of unsaturated open-chain hydrocarbons such as ethylene; an alkene with only one carbon-carbon double bond.
A trigonal-trapezohedral mineral containing barium, calcium, carbon, oxygen, and strontium.
A village in Kostiantynivka urban hromada, Kramatorsk Raion, Donetsk Oblast, Ukraine, founded in 1745.
A rural settlement in Druzhkivka urban hromada, Kramatorsk Raion, Donetsk Oblast, Ukraine, founded in 1711.
A trigonal-ditrigonal pyramidal light pink mineral containing aluminum, boron, hydrogen, oxygen, silicon, and sodium.
A bay, an extension of the Kola Inlet of the Barents Sea, on the Kola Peninsula of Murmansk Oblast, Russia.
A village, the administrative centre of Olenyevskoye rural settlement, Dubovsky Raion, Volgograd Oblast, Russia.
A type of energy-absorbing landing gear strut in which sudden compression or extension of the strut causes a gas-filled chamber to push or pull a piston which forces oil through a small orifice, resulting in absorption of energy through viscous effects.
A tyrosol ester isolated from extra-virgin olive oil, with anti-inflammatory and antioxidant properties.
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 70. 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.