13-letter words containing o, a, r, s
- agroterrorism — the use of biological agents as weapons against agricultural and food-supply industries
- ahistorically — In an ahistorical way.
- airworthiness — (of an aircraft) meeting established standards for safe flight; equipped and maintained in condition to fly.
- albertosaurus — A giant fierce carnivorous tyrannosaurus-like dinosaur, of gemus Albertosaurus, discovered in Alberta, Canada.
- aldosteronism — high blood pressure caused by excess aldosterone in the blood and urine
- aleksandropol — a former name of Gumri.
- aleksandrovsk — a city in SE Ukraine, on the Dnieper River.
- alligatorfish — a slender marine fish, Aspidophoroides monopterygius, of Atlantic seas, having overlapping plates covering the body.
- alliterations — Plural form of alliteration.
- alongshoreman — a person employed to load and unload ships
- alpha orionis — Betelgeuse
- alpha scorpii — Antares
- alsike clover — a European clover, Trifolium hybridum, having pink flowers, grown in the U.S. for forage.
- alstroemerias — Plural form of alstroemeria.
- althorp house — a mansion in Northamptonshire: seat of the Earls Spencer since 1508; originally a medieval house; altered (1787) to its present neoclassical style by Henry Holland. Diana, Princess of Wales is buried on Round Oval Island in the centre of the ornamental lake in Althorp Park
- aluminiferous — containing or yielding aluminium or alumina
- amarantaceous — amaranthine
- ambassadorial — Ambassadorial means belonging or relating to an ambassador.
- ambidexterous — ambidextrous
- ambimoustrous — able to use a computer mouse proficiently with either hand
- ambroise pare — Ambroise [ahn-brwaz] /ɑ̃ˈbrwaz/ (Show IPA), 1510–90, French surgeon.
- amor asteroid — one of a small group of asteroids whose orbits approach but do not cross that of the earth: named after the first such asteroid discovered (1932).
- amorphousness — lacking definite form; having no specific shape; formless: the amorphous clouds.
- amphiprostyle — (esp of a classical temple) having a set of columns at both ends but not at the sides
- amphitrichous — having a single flagellum at each end.
- amphotericins — Plural form of amphotericin.
- anachronistic — You say that something is anachronistic when you think that it is out of date or old-fashioned.
- anachronously — in an anachronous manner
- anaphrodisiac — tending to lessen sexual desire
- anchorpersons — Plural form of anchorperson.
- andersen nexo — Nexö, Martin Andersen.
- andersonville — town in SW central Ga.: site of a Confederate prison in the Civil War
- androcentrism — centered on, emphasizing, or dominated by males or masculine interests: an androcentric society; an androcentric religion.
- androdioecism — the state of being androdioecious
- androgynously — In an androgynous manner.
- anfractuosity — the condition or quality of being anfractuous
- angiosarcomas — Plural form of angiosarcoma.
- angiospermous — of or relating to an angiosperm; having enclosed seeds.
- Ångstrom unit — a unit of length equal to 10 −10 metre, used principally to express the wavelengths of electromagnetic radiations. It is equivalent to 0.1 nanometre
- angular house — any of the four astrological houses that begin at the angles: the first, fourth, seventh, and tenth houses, that correspond, respectively, to self, home, others, and career.
- animadversion — criticism or censure
- anise camphor — anethole.
- anisometropia — an imbalance in the power of the two eyes to refract light
- anisometropic — relating to anisometropia
- another-guess — of another kind.
- antenniferous — having antennae
- anthroposcopy — physiognomy (def 2).
- anthroposophy — the spiritual and mystical teachings of Rudolph Steiner, based on the belief that creative activities such as myth making, which formed a part of life in earlier times, are psychologically valuable, esp for educational and therapeutic purposes
- anticorrosion — the prevention or counteracting of corrosion
- anticorrosive — preventing corrosion