15-letter words containing t, i, o, n
- airborne attack — an attack involving airborne troops
- airconditioning — Alternative spelling of air conditioning.
- airmail edition — an edition of a newspaper that is printed on very thin paper so it is easier and cheaper to distribute
- allorecognition — The ability of an individual organism to distinguish its own tissues from those of another.
- almirante brown — a city in E Argentina, near Buenos Aires.
- alpha radiation — alpha particles emitted from a radioactive isotope
- alphabetisation — The act or process of arranging in alphabetical order.
- alphabetization — Alternative form of alphabetisation.
- alpine accentor — a small bird of the sparrow family, Prunella collaris, found especially in mountain regions of S Europe and Asia
- alta california — a former Spanish colony of New Spain, in the modern-day states of California, Nevada, and N Arizona: ceded by Mexico to the United States 1848.
- altai mountains — a mountain system of central Asia, in W Mongolia, W China, and S Russia. Highest peak: Belukha, 4506 m (14 783 ft)
- alte pinakothek — a museum in Munich housing a collection of paintings dating from the Middle Ages to the late 18th century
- aluminosilicate — a silicate in which some of the silicon in the tetrahedral unit SiO4 has been replaced by aluminium
- aluminum borate — a white, granular, water-insoluble powder, 2Al 2 O 3 ⋅B 2 O 3 ⋅3H 2 O, used chiefly in the manufacture of crown glass.
- ambrosian chant — the liturgical chant, established by Saint Ambrose, characterized by ornamented, often antiphonal, singing.
- amenity society — a voluntary society established with the purpose of preserving historic art and architecture
- american cotton — upland cotton.
- american gothic — a painting (1930) by Grant Wood.
- american smooth — a style of competitive ballroom dancing which incorporates elements of Latin dance
- americanization — Americanization is the process by which people or countries become more and more similar to Americans and the United States.
- americanologist — a foreign expert or specialist in American cultural or political matters: a leading Americanologist in the Kremlin.
- ammunition belt — a belt for carrying ammunition
- ammunition clip — a device for storing rounds of ammunition and feeding them into a weapon
- ammunition dump — a place where ammunition is left
- amyl propionate — a colorless liquid, C 8 H 16 O 2 , having an applelike odor, used chiefly as a scent in the manufacture of flavorings and perfume.
- an axe to grind — an ulterior motive
- anacoluthically — in an anacoluthic manner
- anacostia river — a river in the District of Columbia flowing into the Potomac River. about 24 miles (39 km) long.
- anaesthesiology — the science of administering anesthetics.
- anchorage point — a point to which something such as the straps securing a childseat can be safely attached
- ancient history — Ancient history is the history of ancient civilizations, especially Greece and Rome.
- ancient of days — a name for God, originating in the Authorized Version of the Old Testament (Daniel 7:9)
- ancylostomiasis — infestation of the human intestine with blood-sucking hookworms, causing progressive anaemia
- androstenedione — a weak hormone, C19H26O2, produced by the ovaries, testes, and adrenal glands as a precursor to estrogen, testosterone, etc.: formerly taken in a concentrated tablet or capsule form as by some bodybuilders
- anesthetization — to render physically insensible, as by an anesthetic.
- anfractuosities — Plural form of anfractuosity.
- angina pectoris — a sudden intense pain in the chest, often accompanied by feelings of suffocation, caused by momentary lack of adequate blood supply to the heart muscle
- angiotensin iii — any of three oligopeptides occurring in plasma, an inactive form (angiotensin I) and two varieties (angiotensin II and angiotensin III) that elevate blood pressure and stimulate the adrenal cortex to secrete aldosterone.
- angustirostrate — having a narrow, beak-like part
- anisotropically — Physics. of unequal physical properties along different axes. Compare isotropic (def 1).
- ankylostomiasis — ancylostomiasis
- anne hutchinson — Anne Marbury [mahr-buh-ree] /ˈmɑr bə ri/ (Show IPA), 1591–1643, American religious liberal, born in England: banished from Massachusetts 1637.
- anne of austria — 1601–66, wife of Louis XIII of France and daughter of Philip III of Spain: regent of France (1643–61) for her son Louis XIV
- annihilationism — the teaching or principle that trespassers and evildoers are completely destroyed rather than made to suffer in hell after death
- annihilationist — A person who believes that eternal punishment is the annihilation of both the body and the soul.
- anomalistically — In an anomalistic manner; with irregularity.
- antarctic ocean — the sea surrounding Antarctica, consisting of the most southerly parts of the Pacific, Atlantic, and Indian Oceans
- anteprohibition — before prohibition.
- anteroposterior — Relating to or directed toward both front and back.
- anthony hawkins — Sir Anthony Hope ("Anthony Hope") 1863–1933, English novelist and playwright.