12-letter words containing a, l, s, t, o
- antipetalous — standing before the petals of a plant
- antipolitics — the rejection of party and electoral politics
- antiroyalism — Opposition to royals or royalism.
- antiroyalist — opposed to the monarchy
- antisepalous — facing the sepals or calyx leaf
- antisociable — Antisocial.
- antisocially — In an antisocial manner.
- anton sailer — Anton [ahn-tohn] /ˈɑn toʊn/ (Show IPA), ("Toni") 1935–2009, Austrian skier.
- aphoristical — Alternative form of aphoristic.
- apocalyptist — the writer of the Apocalypse or a related work
- apostle bird — a gregarious grey-and-brown Australian nest-building bird, Struthidea cinerea
- apostolicity — the quality of being apostolic
- appellations — Plural form of appellation.
- applications — Plural form of application.
- appositional — the act of placing together or bringing into proximity; juxtaposition.
- araeosystyle — (of columned buildings) having an alternately very wide and very narrow intercolumniation
- archeologist — archaeology.
- arctophilist — a collector of teddy bears
- aristolochia — any of various plants of the genus Aristolochia of the family Aristolochiaceae
- aristotelian — of or relating to Aristotle or his philosophy
- arms control — an agreement between two or more countries to reduce the number of weapons owned, with the aim of preventing war
- arousability — to stimulate sexually.
- arthroplasty — surgical repair of a diseased joint
- articulators — Plural form of articulator.
- artiodactyls — Plural form of artiodactyl.
- arts council — an organization that provides funding for a variety of arts activities
- asphalt rock — a rock formation, usually of limestone or sandstone, containing large amounts of bitumens.
- aspirational — If you describe someone as aspirational, you mean that they have strong hopes of moving to a higher social status.
- assault boat — a portable boat used for landing troops on beaches and for crossing rivers.
- assibilation — (linguistics) A sound change resulting in a sibilant consonant, commonly the final phase of palatalization.
- assimilation — an assimilating or being assimilated
- assimilators — Plural form of assimilator.
- assimilatory — characterized by assimilation; assimilating.
- assimulation — Obsolete form of assimilation.
- astacologist — a person who investigates and analyses crayfish
- astonishable — (obsolete) Astonishing.
- astoundingly — capable of overwhelming with amazement; stunningly surprising.
- astrobiology — the branch of biology that investigates the possibility of life elsewhere in the universe
- astrogeology — the study of the structure, composition, and history of other planets and other bodies in the solar system
- astrological — the study that assumes and attempts to interpret the influence of the heavenly bodies on human affairs.
- astronomical — If you describe an amount, especially the cost of something as astronomical, you are emphasizing that it is very large indeed.
- asymptotical — of or relating to an asymptote.
- at all costs — If you say that something must be avoided at all costs, you are emphasizing that it must not be allowed to happen under any circumstances.
- at all hours — If you say that something happens at all hours of the day or night, you disapprove of it happening at the time that it does or as often as it does.
- at long last — finally, after difficulty, delay, or irritation
- at wholesale — in large quantities
- atactostelic — Of or possessing an atactostele.
- atholl brose — a mixture of whisky and honey left to ferment before consumption
- auction sale — an instance of items being sold by auction
- audiologists — Plural form of audiologist.