12-letter words containing a, s, t, e, o
- appropriates — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approximates — near or approaching a certain state, condition, goal, or standard.
- araeosystyle — (of columned buildings) having an alternately very wide and very narrow intercolumniation
- arc cosecant — the angle, measured in radians, that has a cosecant equal to a given number. Symbol: csc −1. Abbreviation: arc csc;
- archenterons — Plural form of archenteron.
- archeologist — archaeology.
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- arfvedsonite — a type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
- aristophanes — ?448–?380 bc, Greek comic dramatist, who satirized leading contemporary figures such as Socrates and Euripides. Eleven of his plays are extant, including The Clouds, The Frogs, The Birds, and Lysistrata
- aristotelian — of or relating to Aristotle or his philosophy
- arsenopyrite — a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS
- arteriograms — Plural form of arteriogram.
- arthroscopes — Plural form of arthroscope.
- arthrospores — an isolated vegetative cell that has passed into a resting state, occurring in bacteria and not regarded as a true spore.
- arthrotomies — Plural form of arthrotomy.
- asbestos mat — a heat-proof mat
- ascensionist — a person who has completed a mountain ascent, esp a notable one
- ascomycetous — belonging or pertaining to the Ascomycota.
- aspect ratio — the ratio of width to height of the picture on a television or cinema screen
- assentaneous — having a tendency to agree, comply or acquiesce
- assertations — Plural form of assertation.
- asseveration — the act of asseverating.
- assortedness — the position of being sorted, grouped or harmonized with, well or badly, or provided with a good or bad assortment or mixture
- assuefaction — the condition of being or becoming familiar with or used to something
- astigmometer — an apparatus for measuring the degree of astigmatism.
- astigmoscope — astigmatoscope.
- astonishable — (obsolete) Astonishing.
- astonishment — Astonishment is a feeling of great surprise.
- astrochemist — (chemistry, astronomy) A chemist or astronomer whose speciality is astrochemistry.
- astrogeology — the study of the structure, composition, and history of other planets and other bodies in the solar system
- at the worst — bad or ill in the highest, greatest, or most extreme degree: the worst person.
- at wholesale — in large quantities
- atactostelic — Of or possessing an atactostele.
- atheromatous — a sebaceous cyst.
- atholl brose — a mixture of whisky and honey left to ferment before consumption
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atmospherium — an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
- atom smasher — accelerator (sense 3)
- attorneyship — The office or profession of an attorney.
- auction sale — an instance of items being sold by auction
- auction site — a commercial website on which items are sold by internet auction
- audio system — integrated equipment for producing amplified sound, as in a hi-fi or a mobile disco, or as a public-address system on stage
- austronesian — of or relating to Austronesia, its peoples, or their languages
- auto-erotism — the arousal and satisfaction of sexual excitement within or by oneself, as by masturbation.
- autocatalyse — to cause an internal, self-produced, chemical reaction
- autochangers — Plural form of autochanger.
- autochthones — Alternative spelling of autochthons.
- autodestruct — likely to or possessing the power to destroy or obliterate itself or its possessor
- autodiallers — Plural form of autodialler.
- autoeciously — in an autoecious manner