11-letter words containing e, r, o, s, i
- apostlebird — an omnivorous bird, Struthidea cinerea, of eastern Australia, that has chiefly dark gray-brown plumage with white tail markings and is noted for its habit of traveling in groups of about 12 related individuals.
- appressoria — a flattened and thickened tip of a hyphal branch, formed by some parasitic fungi, that facilitates penetration of the host plant.
- aquaerobics — A form of aerobics done while in water.
- arabinoside — a glycoside yielding arabinose when hydrolysed
- araliaceous — of, relating to, or belonging to the Araliaceae, a chiefly tropical family of trees, shrubs, or woody climbers having small clusters of whitish or greenish flowers. The family includes the ivy and ginseng
- arborvitaes — Plural form of arborvitae.
- arboviruses — Plural form of arbovirus.
- archaeornis — an extinct primitive Jurassic bird, formerly placed in the genus Archaeornis but now thought to be a species of archaeopteryx
- archdiocese — An archdiocese is the area over which an archbishop has control.
- arenicolous — growing or living in sand or sandy places
- aristoteles — a walled plain in the first quadrant of the face of the moon: about 60 miles (97 km) in diameter.
- arkeologist — Someone who studies the story of Noah's Ark, particularly by searching for physical evidence which would corroborate it.
- arrestation — the slowing or stopping of the development or progress of something
- ars poetica — the art of poetry
- arthrodesis — the fusion of bones in a joint through surgery which causes immobility of the joint
- asbestiform — having the look or structure of asbestos
- asperations — Plural form of asperation.
- aspergation — the action of sprinkling, suffusing or irrigating with water
- aspersorium — a basin containing holy water with which worshippers sprinkle themselves
- assertation — An assertion, statement of opinion.
- assessorial — a person who makes assessments, especially for purposes of taxation.
- assortative — Denoting or involving the preferential mating of animals or marrying of people with similar characteristics.
- asteroidean — an echinoderm of the class Asteroidea, comprising the starfishes.
- astrometric — (astronomy) of or relating to astrometry.
- astronomize — to practise or study astronomy or engage in astronomical matters
- atmospheric — Atmospheric is used to describe something which relates to the Earth's atmosphere.
- attorneyism — the slyness and cleverness associated with attorneys
- auctioneers — Plural form of auctioneer.
- audiometers — Plural form of audiometer.
- austronesia — the islands of the central and S Pacific, including Indonesia, Melanesia, Micronesia, and Polynesia
- authorities — the power to determine, adjudicate, or otherwise settle issues or disputes; jurisdiction; the right to control, command, or determine.
- autocracies — Plural form of autocracy.
- autodialers — Plural form of autodialer.
- autoerotism — pleasurable sensations or tensions arising in the erogenous body zones without external stimulation
- autowinders — Plural form of autowinder.
- aversion-to — a strong feeling of dislike, opposition, repugnance, or antipathy (usually followed by to): a strong aversion to snakes and spiders.
- azoospermia — absence of spermatozoa in the semen
- azores high — a subtropical high centered near the Azores.
- bacciferous — bearing berries
- bachelorism — bachelorhood
- bacteriosis — any bacterial disease
- bacteroides — any of several rod-shaped, anaerobic bacteria of the genus Bacteroides, occurring in the alimentary and genitourinary tracts of humans and other mammals, certain species of which are pathogenic.
- base period — a neutral period used as a standard for comparison in constructing an index to express a variable factor: 100 is usually taken as the index number for the variable in the base period
- behaviorism — Behaviorism is the belief held by some psychologists that the only valid method of studying the psychology of people or animals is to observe how they behave.
- behaviorist — the theory or doctrine that human or animal psychology can be accurately studied only through the examination and analysis of objectively observable and quantifiable behavioral events, in contrast with subjective mental states.
- belorussian — of Belarus or its people, language, or culture
- belowstairs — (formerly) at or in the basement of a large house, considered as the place where the servants live and work
- berylliosis — a lung disease caused by inhaling beryllium
- bible story — a story from the Bible
- bioresearch — the investigation of the nature of living organisms; biological research.