15-letter words containing o, s, i, t
- antisegregation — opposed to or acting against segregration
- antishoplifting — designed to prevent shoplifting
- antispeculation — opposed to or acting against excessive oil speculation
- antituberculous — (medicine) Acting to combat or counteract tuberculosis.
- antivivisection — opposed to the act or practice or performing experiments on living animals, involving cutting into or dissecting the body
- aortic stenosis — abnormal narrowing of the aorta, especially of its orifice, usually as a result of rheumatic fever or embryologic anomalies.
- apolipoproteins — Plural form of apolipoprotein.
- apollo asteroid — one of a number of asteroids whose orbits cross that of the earth.
- apophthegmatise — to speak in apophthegms
- apophthegmatist — a person who creates apophthegms
- apostle pitcher — a stoneware pitcher decorated in relief with figures of the apostles.
- apostolic vicar — vicar apostolic.
- apostolicalness — The state or quality of being apostolical.
- apostrophically — (rhetoric) Using apostrophe; with sudden exclamatory dialogue.
- apple macintosh — Macintosh
- applesoft basic — (language) A version of BASIC for Apple computers.
- approach lights — lights on the runway that guide planes coming in to land
- appropriateness — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approximateness — The quality of being approximate.
- archaeobotanist — A person engaged in archaeobotany.
- archiepiscopate — the rank, office, or term of office of an archbishop
- aristotelianism — a philosophical tradition based on the wide-ranging belief system of Aristotle
- arms inspection — the official checking of a country's weapons and other military equipment, usually to check that international agreements have been respected
- arrondissements — Plural form of arrondissement.
- articles of war — the disciplinary and legal procedures by which the naval and military forces of Great Britain were bound before the 19th century
- asian shorthair — a generic term for a group of breeds of short-haired cat of Burmese type, including the Bombay
- asiatic cholera — cholera (def 1).
- assimilationism — the theory of promoting the incorporation and mixing of different groups in society
- assimilationist — a person who favours and promotes the incorporation and mixing of different groups in society
- association law — any law governing the association of ideas
- astrobiologists — Plural form of astrobiologist.
- astrodynamicist — a person who studies astrodynamics
- astronautically — In an astronautic way.
- astronavigation — celestial navigation
- astrophysically — from an astrophysical point of view
- astrophysicists — Plural form of astrophysicist.
- at pistol point — being under or using the threat of being shot
- at short notice — Notice is used in expressions such as 'at short notice', 'at a moment's notice' or 'at twenty-four hours' notice', to indicate that something can or must be done within a short period of time.
- at your service — You can use 'at your service' after your name as a formal way of introducing yourself to someone and saying that you are willing to help them in any way you can.
- atherosclerosis — a degenerative disease of the arteries characterized by patchy thickening of the inner lining of the arterial walls, caused by deposits of fatty material; a form of arteriosclerosis
- atherosclerotic — Of, pertaining to, or afflicted with atherosclerosis.
- athletic sports — sports, esp track and field events, in which athleticism is required
- atlantic salmon — a valuable food and game fish, Salmo salar, mainly of northern coastal Atlantic waters or, when spawning, in freshwater streams tributary to the ocean.
- atlas mountains — a mountain system of N Africa, between the Mediterranean and the Sahara. Highest peak: Mount Toubkal, 4165 m (13 664 ft)
- atmospherically — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- atrabiliousness — The state or quality of being characterized by melancholy or glumness.
- audubon society — a North American organization devoted to the conservancy of birds
- authentications — Plural form of authentication.
- autobiographers — Plural form of autobiographer.
- autobiographies — Plural form of autobiography.