12-letter words containing o, s, i
- adrianopolis — Edirne
- adscititious — added or supplemental; additional
- adventitious — added or appearing accidentally or unexpectedly
- advertorials — Plural form of advertorial.
- aeroacoustic — Relating to aeroacoustics.
- aerodonetics — the study of soaring or gliding flight, esp the study of gliders
- aerodynamics — Aerodynamics is the study of the way in which objects move through the air.
- aeroelastics — the study of aeroelastic phenomena.
- aeroembolism — an embolism of air bubbles often caused by surgery, induced abortion, or decompression sickness
- aeroneurosis — a functional disorder of aeroplane pilots characterized by anxiety and various psychosomatic disturbances, caused by insufficient oxygen at high altitudes and the emotional tension of flying
- aerosiderite — a meteorite which is composed mainly of iron
- aesthesiogen — a substance that stimulates or produces sensation
- aethrioscope — an instrument which measures temperature changes caused by different conditions of the sky
- affectations — Plural form of affectation.
- afficionados — Plural form of afficionado.
- affiliations — Plural form of affiliation.
- affirmations — Plural form of affirmation.
- aforestation — Alternative spelling of afforestation.
- afro-asiatic — a family of languages of SW Asia and N Africa, consisting of the Semitic, ancient Egyptian, Berber, Cushitic, and Chadic subfamilies
- afro-british — of or relating to British people of African descent
- afrocentrism — centered on Africa or on African-derived cultures, as those of Brazil, Cuba, and Haiti: Afrocentric art.
- agamogenesis — asexual reproduction, such as fission or parthenogenesis
- agaricaceous — belonging to the Agaricaceae, a family of fungi including mushrooms having blade-shaped gills on the underside of the cap.
- aggravations — Plural form of aggravation.
- aggregations — Plural form of aggregation.
- aggrupations — Plural form of aggrupation.
- agnostically — a person who holds that the existence of the ultimate cause, as God, and the essential nature of things are unknown and unknowable, or that human knowledge is limited to experience. Synonyms: disbeliever, nonbeliever, unbeliever; doubter, skeptic, secularist, empiricist; heathen, heretic, infidel, pagan.
- agriproducts — Plural form of agriproduct.
- agrobusiness — the businesses collectively associated with the production, processing, and distribution of agricultural products.
- agroindustry — an activity combining agriculture and industry
- ailurophiles — Plural form of ailurophile.
- ailurophobes — Plural form of ailurophobe.
- air division — an organizational unit smaller than an air force, usually composed of a headquarters and two or more wings
- air embolism — the presence in the tissues and blood of a gas, such as air or nitrogen bubbles, caused by an injection of air or, in the case of nitrogen, by an abrupt and substantial reduction in the ambient pressure
- air observer — observer (def 3).
- airbrush out — to remove evidence of (someone or something from photographs, books, or history)
- airpocalypse — (informal) The presence of dense smog in many parts of China.
- alfonso xiii — 1886–1941, king of Spain (1886–1931), who was forced to abdicate on the establishment of the republic in 1931
- algesiometer — an instrument for determining the sensitiveness of the skin to a painful stimulus.
- all kinds of — You can use all kinds of to emphasize that there are a great number and variety of particular things or people.
- allegoristic — writing or using allegory; interpreting in an allegorical sense.
- allegrissimo — (music) A direction in musical notation indicating that the musical piece should be played very fast and lively.
- allomorphism — variation in the crystalline form of a chemical compound
- alongside of — at the side of; beside; adjoining
- alpha boötis — Arcturus
- alpha leonis — Regulus1
- alstroemeria — any plant of the tuberous perennial liliaceous genus Alstroemeria, originally S American, grown for their brightly coloured orchid-like flowers
- altaltissimo — the apex of something
- altercations — Plural form of altercation.
- alternations — Plural form of alternation.