15-letter words containing t, i, o, n
- antipositivists — Plural form of antipositivist.
- antiprogressive — opposed to or acting against progression in society
- antirationalism — the opposition to rationalism
- antirationalist — opposed to rationalism
- antirationality — the opposition to rationality
- antiremonstrant — the party that opposed the Remonstrants
- antiretrovirals — Plural form of antiretroviral.
- antiromanticism — the opposition to romanticism
- antisegregation — opposed to or acting against segregration
- antishoplifting — designed to prevent shoplifting
- antispeculation — opposed to or acting against excessive oil speculation
- antitheoretical — opposed to or contradicting a theory
- antitraditional — opposed to or acting with disregard for tradition
- 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.
- apostolicalness — The state or quality of being apostolical.
- apple macintosh — Macintosh
- apprentice work — work done when young and a novice
- appropinquation — the action of approaching
- appropriateness — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approval rating — approval of a politician as shown by opinion polls
- approximateness — The quality of being approximate.
- arbitration bar — a bar of cast iron used as a sample for the batch to which it belongs.
- archaeobotanist — A person engaged in archaeobotany.
- architectonical — Alternative form of architectonic.
- 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.
- arterialization — to convert (venous blood) into arterial blood by the action of oxygen in the lungs.
- asian shorthair — a generic term for a group of breeds of short-haired cat of Burmese type, including the Bombay
- 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
- astrodynamicist — a person who studies astrodynamics
- astronautically — In an astronautic way.
- astronavigation — celestial navigation
- 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 the point of — very close to; on the verge of
- 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)
- atrabiliousness — The state or quality of being characterized by melancholy or glumness.
- audio equipment — electrical devices used to play or record sound
- auditor general — (in Canada) a federal official responsible for auditing government departments and making an annual report
- audubon society — a North American organization devoted to the conservancy of birds
- authentications — Plural form of authentication.
- autocannibalism — The eating of part of one's own body.
- autocollimation — the process used in an autocollimator.