9-letter words containing a, l, i, o
- notaphily — the collecting of bank notes as a hobby.
- noticable — Misspelling of noticeable.
- novennial — Recurring every nine years.
- novillada — (bullfighting) A bullfight between a novillo and a novillero.
- o'faolain — Seán [shawn] /ʃɔn/ (Show IPA), 1900–91, Irish writer and teacher.
- obbligato — (used as a musical direction) obligatory or indispensable; so important that it cannot be omitted.
- obconical — conical, with the attachment at the pointed end.
- oblations — Plural form of oblation.
- obligated — to bind or oblige morally or legally: to obligate oneself to purchase a building.
- obligatee — (government) A person who is obligated by law to do something.
- obligates — Third-person singular simple present indicative form of obligate.
- obligator — to bind or oblige morally or legally: to obligate oneself to purchase a building.
- obliviate — To forget, to wipe from existence.
- obloquial — having a relation or connection to obloquy
- obsequial — Relating to an obsequy or funeral rite.
- occipital — of, relating to, or situated near the occiput or the occipital bone.
- octaploid — an organism that consists of eight groups or sets of chromosomes
- octennial — occurring every eight years.
- ocularist — a person who makes artificial eyes
- odalisque — a female slave or concubine in a harem, especially in that of the sultan of Turkey.
- oedipally — in an oedipal manner
- officials — Plural form of official.
- officinal — kept in stock by apothecaries, as a drug. Compare magistral (def 1).
- ohmically — By means of ohmic heating, the process by which the passage of an electric current through a conductor releases heat.
- oil gauge — a device which indicates whether levels of lubricant in a vehicle or machine are high or low
- oil gland — uropygial gland.
- oil paint — oil color.
- oil patch — an area in which oil is produced.
- oil sands — a sand or sandstone containing oil or tarry residue in the pore spaces.
- oil shale — a black or dark-brown shale or siltstone rich in bitumens, from which shale oil is obtained by destructive distillation.
- oil-paper — a paper made waterproof and translucent by treatment with oil.
- oil-plant — any of several plants, as the castor-oil plant or sesame, the seeds of which yield an oil.
- old latin — the Latin language in use from the earliest inscriptions to c100 b.c. Abbreviation: OL, OL., O.L.
- old media — the media in existence before the arrival of the internet, such as newspapers, books, television, and cinema
- oleanolic — Of or pertaining to oleanolic acid or its derivatives.
- olfactics — The study of smells and how they are perceived.
- olfaction — the act of smelling.
- olfactive — Of or pertaining to the sense of smell; olfactory.
- oligaemia — a reduction in the volume of the blood, as occurs after haemorrhage
- oligarchs — Plural form of oligarch.
- oligarchy — a form of government in which all power is vested in a few persons or in a dominant class or clique; government by the few.
- olympiads — Plural form of olympiad.
- omphaloid — resembling or similar to the navel
- on a limb — isolated
- on a line — in the same plane; level
- ontically — In an ontic sense.
- opalizing — Present participle of opalize.
- oppilated — Simple past tense and past participle of oppilate.
- opthalmic — Misspelling of ophthalmic.
- optically — of, relating to, or applying optics or the principles of optics.