English Words: O
1,431 words · Page 11 of 29
A country in West Asia in the Middle East. Official name: Sultanate of Oman. Capital: Muscat.
A Spanish card game, usually played by three people. It involves forty cards, omitting the ranks of 8, 9 and 10.
An appointed official whose duty is to investigate complaints, generally on behalf of individuals such as consumers or taxpayers, against institutions such as companies and government departments.
The twenty-fourth letter of the Classical and the Modern Greek alphabet, and the twenty-eighth letter of the Old and the Ancient Greek alphabet, i.e. the last letter of every Greek alphabet. Uppercase version: Ω; lowercase: ω.
A dish made with beaten eggs cooked in a frying pan without stirring, flipped over to cook on both sides, and sometimes filled or topped with other foodstuffs, for example cheese or chives.
Something which portends or is perceived to portend either a good or evil event or circumstance in the future, or which causes a foreboding; a portent or augury.
A substituted benzimidazole (trademark Losec, Prilosec) which is a proton pump inhibitor and inhibits secretion of gastric acid, being given orally in the treatment of ulcers and gastroesophageal reflux; 5-methoxy-2-(4-methoxy-3,5-dimethyl-2-pyridylmethylsulfinyl)benzimidazole, C₁₇H₁₉N₃O₃S.
The 15th letter of the Classical and Modern Greek alphabets (16th in Ancient and Old Greek), used in ordering lists as in naming (astronomy) the 15th star of a constellation or (epidemiology) the 15th discovered major variant of a disease.
Integrating all physical (offline) and digital contact channels to provide a unified customer experience.
In every direction, especially of a radio system capable of transmitting or receiving signals in all directions, or of a microphone capable of detecting sound from all directions.
The ability to be, or the characteristic of being, at all places at the same time (usually only attributed to God).
A multiple race event in track cycling. Historically the omnium has had a variety of formats. Currently it consists of the following six events: flying lap, points race, elimination, individual pursuit, scratch race, and time trial.
An animal which is able to consume both plants (like a herbivore) and meat (like a carnivore).
A city, the administrative center of Omsk Oblast, Russia, the seventh-largest in the country by population.
(business) The process of bringing a new employee on board, incorporating training and orientation.
Any gene that contributes to the conversion of a normal cell into a cancerous cell when mutated or expressed at high levels.
The branch of medicine concerned with tumors, including study of their development, diagnosis, treatment, and prevention.
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 11. 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.