English Words: O

15,494 words · Page 191 of 310

ostruthinnoun

An organic compound found in the masterwort (Imperatoria ostruthium).

ostryopsitriolnoun

A cyclic diarylheptanoid found in the plant Ostryopsis nobilis.

Ostródaname

A town in Warmian-Masurian Voivodeship, Poland.

Ostrów Mazowieckaname

A town and urban gmina, the county seat of Ostrów County, Masovian Voivodeship, Poland.

osturduckennoun

An ostrich stuffed with a turducken; that is, a boned chicken stuffed with some sort of breadcrumb or sausage stuffing, inside a boned duck, inside a boned turkey, inside a boned ostrich.

Ostwald ripeningnoun

An observed phenomenon in solid solutions or liquid sols, where an inhomogeneous structure changes over time, i.e. small crystals or particles dissolve and redeposit onto larger crystals or particles.

Ostwaldianadj

Of or relating to Wilhelm Ostwald (1853–1932), Latvian chemist and philosopher, one of the founders of the field of physical chemistry.

Ostyaknoun

A member of any of several indigenous peoples in Siberia, Russia, including the Khanty people and the Ket people.

Ostúaname

A river in El Salvador.

Osuchname

A surname from Polish.

Osugboname

Synonym of Ogboni (“African fraternal institution”).

osumilitenoun

A hexagonal mineral with the chemical formula (K,Na)(Mg,Fe⁺²)₂(Al,Fe)₃(Si,Al)₁₂O₃₀·H₂O.

Osunname

A major orisha in the Yoruba and santería religion.

Osunaname

A surname from Spanish.

Oswaldname

A male given name from Old English.

oswaldpeetersitenoun

A monoclinic-prismatic canary yellow mineral containing carbon, hydrogen, oxygen, and uranium.

Oswaldtwistlename

A village in Hyndburn borough, Lancashire, England (OS grid ref SD7327).

Oswegannoun

A native or inhabitant of Oswego.

Oswegoname

A large village in Kendall County, Illinois, United States.

Oswego teanoun

An American aromatic herb (Monarda didyma) with bright red labiate flowers; also called bee balm or bergamot.

Oswestryname

A town and civil parish with a town council in north-west Shropshire, England (OS grid ref SJ2929).

Osypenkoname

A few settlements in Ukraine, including:

OTnoun

Initialism of overtime.

OT3noun

One true threesome; a polyamorous ship involving three characters that is a personal favorite of a fan.

Otaname

A surname from Japanese.

otacorenoun

A music genre of songs with their origins in fan communities (such as that of J-pop) and typically having an electropop beat.

otacousticadj

Assisting the sense of hearing.

otacousticonnoun

An instrument to aid hearing, such as an ear trumpet or hearing aid.

Otagoname

A region in the South Island of New Zealand.

Otaheitannoun

A Tahitian.

Otaheitename

Tahiti.

Otahuhuname

A suburb of Auckland, New Zealand, situated on a narrow isthmus.

otak-otaknoun

Grilled fish cake wrapped inside a banana leaf; a popular snack food in Southeast Asia, particularly Indonesia, Malaysia, Singapore.

Otakiname

A town in Kapiti Coast district, Wellington region, New Zealand.

otakunoun

One with an obsessive interest in something, particularly (originally derogatory) an obsessive Japanese fan of anime or manga.

otakudomnoun

otakus collectively

otakuismnoun

The obsessive interest of an otaku, especially an interest in anime or manga.

otakukinnoun

A person who claims or believes that their soul is a reincarnation or parallel incarnation of a fictional character (especially, from anime, manga, or video games).

otalgianoun

earache

otalgicadj

Of or pertaining to otalgia.

otamannoun

Alternative form of ataman.

Otamatonenoun

An electronic musical synthesizer.

Otaniname

A surname from Japanese.

otapostasisnoun

The condition of abnormally protruding ears

otariineadj

Alternative form of otarine.

otarineadj

Of or relating to the eared seals.

Otaruname

A port city in Hokkaido Prefecture, Japan.

otarynoun

Synonym of eared seal.

Otataraname

A scattered suburb to the west of Invercargill, Southland, New Zealand.

Otautauname

A small town in Southland, New Zealand.

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 191. 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.