12-letter words containing o, r, a, l
- anisothermal — (thermodynamics) Of or pertaining to a system that is not in thermal equilibrium, that does not have a single fixed temperature.
- ankylosaurus — a plant-eating dinosaur of the Cretaceous period that had a tail resembling a club and a body covering of thick scales
- annihilatory — Causing annihilation.
- anorthoclase — a variety of microcline, rich in sodium and sometimes having a play of color: sometimes considered a variety of orthoclase.
- anthologiser — Alternative spelling of anthologizer.
- anthologizer — an anthologist; a creator of an anthology
- anthropoglot — An animal with tongue similar to humans allowing human-like speech.
- anthropoidal — Anthropoid.
- anthropology — Anthropology is the scientific study of people, society, and culture.
- anti-tumoral — a swollen part; swelling; protuberance.
- antielectron — an elementary particle with a positive charge, a positron
- antigropelos — waterproof leggings used to protect against mud
- antirational — opposed to rationalism
- antireligion — opposed to religion
- antiroll bar — a horizontal bar in the suspension system of some automotive vehicles, that stabilizes the body of the vehicle and thereby reduces sway, esp. during turns
- antiroyalism — Opposition to royals or royalism.
- antiroyalist — opposed to the monarchy
- antitumoural — acting against or upon tumours
- anton sailer — Anton [ahn-tohn] /ˈɑn toʊn/ (Show IPA), ("Toni") 1935–2009, Austrian skier.
- aortic valve — a semilunar valve between the aorta and the left ventricle of the heart that prevents the blood from flowing back into the left ventricle.
- aphoristical — Alternative form of aphoristic.
- aplacophoran — solenogaster.
- apocryphally — In an apocryphal manner.
- apostle bird — a gregarious grey-and-brown Australian nest-building bird, Struthidea cinerea
- apparitional — of or relating to an apparition or apparitions; ghostly, spectral
- appeal court — An appeal court is the same as a Court of Appeal.
- appleknocker — Northern U.S. a rustic.
- approachable — If you describe someone as approachable, you think that they are friendly and easy to talk to.
- appropriable — that can be appropriated
- araeosystyle — (of columned buildings) having an alternately very wide and very narrow intercolumniation
- archaeologic — Pertaining to archaeology.
- archeologist — archaeology.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archilochian — denoting or relating to the 7th century bc Greek poet Archilochus or his verse, esp the iambic trimeters or trochaic tetrameters used by him
- archipelagos — Plural form of archipelago.
- arctophilist — a collector of teddy bears
- argillaceous — (of sedimentary rocks and deposits) composed of very fine-grained material, such as clay, shale, etc
- ariel sharon — Ariel, 1928–2014, Israeli military and political leader; prime minister 2001–06.
- aripiprazole — An antipsychotic drug used in the treatment of schizophrenia etc.
- aristolochia — any of various plants of the genus Aristolochia of the family Aristolochiaceae
- aristotelian — of or relating to Aristotle or his philosophy
- armor-plated — An armor-plated vehicle or building has a hard metal covering in order to protect it from gunfire and other missiles.
- armour plate — a tough heavy steel, usually containing chromium, nickel, and molybdenum and often hardened on the surface, used for protecting warships, tanks, etc
- arms control — an agreement between two or more countries to reduce the number of weapons owned, with the aim of preventing war
- aromatically — having an aroma; fragrant or sweet-scented; odoriferous.
- arousability — to stimulate sexually.
- art mobilier — small, movable art objects, especially primitive or prehistoric works of art.
- arthroplasty — surgical repair of a diseased joint
- articulation — Articulation is the action of producing a sound or word clearly, in speech or music.
- articulators — Plural form of articulator.