13-letter words containing o, s, i
- ascoli piceno — a town in E central Italy, in the Marches: capital of the Roman province of Picenum; site of the massacre of all its Roman citizens in the Social War in 90 bc. Pop: 51 375 (2001)
- ascorbic acid — Ascorbic acid is another name for vitamin C.
- aspergillosis — a rare fungal infection, esp of the mucous membranes or lungs, caused by various species of Aspergillus
- aspirationals — Plural form of aspirational.
- assassination — to kill suddenly or secretively, especially a politically prominent person; murder premeditatedly and treacherously.
- assassinators — Plural form of assassinator.
- assiduousness — constant; unremitting: assiduous reading.
- assimilations — Plural form of assimilation.
- associability — the condition of or the capacity to be associable or linked or related in thinking
- associateship — to connect or bring into relation, as thought, feeling, memory, etc.: Many people associate dark clouds with depression and gloom.
- associational — relating to association or alliance or an association, alliance or affiliation
- associatively — in an associative or connective manner
- associativity — the quality of being associative
- assortatively — In an assortative way.
- assortativity — (mathematics) The extent to which nodes of a graph link to others of the same degree.
- assumptionist — Augustinian of the Assumption.
- assyriologist — A person who studies ancient Assyria.
- astacological — relating to astacology
- astereognosis — inability to recognize objects by touch
- asteroid belt — the concentrations of asteroids that move around the sun mainly between the orbits of Mars and Jupiter
- astonishingly — causing astonishment or surprise; amazing: an astonishing victory; an astonishing remark.
- astonishments — Plural form of astonishment.
- astrodynamics — the study of the motion of natural and artificial bodies in space
- astronautical — of or relating to astronautics or astronauts.
- astroparticle — (astrophysics) A subatomic particle of cosmic origin.
- astrophysical — Of or pertaining to astrophysics.
- at a discount — below the regular price
- at this point — at this moment in time
- atamasco lily — any of a genus (Zephyranthes) of bulbous plants of the lily family, with hollow stems, grassy leaves, and funnel-shaped flowers of yellow, pink, red, or purple-tinged white
- aten asteroid — one of a small group of asteroids whose orbits cross that of the earth and whose semimajor axes are smaller than that of the earth.
- athenagoras i — (Aristocles Spyrou) 1886–1972, Archbishop Ecumenical of Constantinople and Ecumenical Patriarch of the Greek Orthodox Church 1948–72.
- atherogenesis — (medicine) The formation of atheromas, especially on the walls of the arteries.
- athletic shoe — a shoe designed to be worn for sports, exercising, or recreational activity, as racquetball, jogging, or aerobic dancing.
- atmospherical — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- atomistically — Also called atomic theory. Philosophy. the theory that minute, discrete, finite, and indivisible elements are the ultimate constituents of all matter.
- atrabilarious — Characterized by melancholy or gloom.
- atrociousness — The state of being atrocious.
- auction house — a commercial company that specializes in selling items at auction
- audaciousness — Risky or daring behaviour.
- audiocassette — a cassette containing audiotape
- audiographics — audiographic teleconferencing
- augmentations — Plural form of augmentation.
- aum shinrikyo — a syncretistic Japanese cult combining elements of Buddhism, Hinduism, and Christianity, founded by Shoko Asahara in 1986; responsible for a number of murders and in particular a nerve-gas attack on the Tokyo underground in 1995
- austin dobson — (Henry) Austin, 1840–1921, English poet, biographer, and essayist.
- austroasiatic — a family of languages spoken in SE Asia and the landsaround the Bay of Bengal and consisting principally of Vietnamese, Khmer, Mon, Khasi, Nicobarese, and the Munda languages.
- authorisation — Alternative spelling of authorization.
- autocatalysis — the catalysis of a reaction in which the catalyst is one of the products of the reaction
- autocatharsis — a therapeutic process designed to free unconscious disturbances by having the patient write about his or her experiences, impressions, etc.
- autodidactism — Alternative form of autodidacticism.
- autodigestion — (biology) The digestion of tissue by enzymes produced by the organism itself.