12-letter words containing a, r, b, o, s
- basidiospore — one of the spores, usually four in number, produced in a basidium
- bastardsword — Alternative spelling of bastard sword.
- batter's box — box1 (def 16a).
- battlefronts — Plural form of battlefront.
- beachcombers — Plural form of beachcomber.
- bean sprouts — the sprouts of newly germinated mung beans, eaten as a vegetable, esp in Chinese dishes
- bean-shooter — peashooter.
- beardtongues — Plural form of beardtongue.
- beaufort sea — part of the Arctic Ocean off the N coast of North America
- behaviourism — Behaviourism 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.
- below stairs — People sometimes use below stairs to refer to the servants in a rich household and the things that are connected with them.
- beta orionis — Rigel
- beta version — beta testing
- bib overalls — overall (def 3a).
- bio-organism — a dangerous fast-proliferating organism that could be used as the basis of a biological weapon
- bioastronomy — the branch of biology which deals with the study or the discovery of life forms on other planets or in space
- biohazardous — a pathogen, especially one used in or produced by biological research.
- bitter aloes — a bitter purgative drug made from the leaves of several species of aloe
- black forest — wooded mountain region in SW Germany
- black grouse — a large N European grouse, Lyrurus tetrix, the male of which has a bluish-black plumage and lyre-shaped tail
- black scoter — a scoter of Eurasia and North America, Melanitta nigra, the adult male of which is black.
- blastosphere — blastula
- board school — (formerly) a school managed by a board elected by local ratepayers
- board shorts — shorts with longer legs, originally meant to protect a surfer's legs against the surfboard
- boardsailing — windsurfing
- body repairs — repairs to the bodywork of cars
- body scanner — a machine using X-rays and a computer, used in medicine to look for signs of disease, or in security operations to look for drugs, weapons, etc
- bog rosemary — any of several species (genus Andromeda) of evergreen shrubs of the heath family, native to cold bogs of North America and Europe, with pink flowers and narrow leaves
- bog-standard — If you describe something as bog-standard you mean that is an ordinary example of its kind, with no exciting or interesting features.
- bond servant — a person who serves in bondage; slave.
- boomer state — Oklahoma
- booster seat — A booster seat or a booster cushion is a special seat which allows a small child to sit in a higher position, for example at a table or in a car.
- boot-scraper — a contraption consisting of an upright metal shape formerly placed outside some houses to enable people to scrape the mud from their boots before going in
- border state — a state adjacent to a border
- border taxes — taxes payable on goods taken across a border
- borosilicate — a salt of boric and silicic acids
- bottlewasher — a person or machine that washes bottles.
- bottom grass — any grass that grows on bottoms or lowlands.
- box lacrosse — a form of lacrosse played indoors, usually on a hockey rink with a wooden floor, between two teams of six players.
- brachycerous — (of insects) having short antennae
- braggadocios — empty boasting; bragging.
- brainstormer — a person who brainstorms
- brass-collar — unwaveringly faithful to a political party; voting the straight ticket: a brass-collar Democrat.
- brassfounder — a person who makes things from brass
- breastplough — a plough driven by the worker's breast, often used to pare turf
- breaststroke — Breaststroke is a swimming stroke which you do lying on your front, moving your arms and legs horizontally in a circular motion.
- brisbane box — a broad-leaved evergreen tree, Tristania conferta, native to Australia, having a deciduous outer bark.
- broadcasting — Broadcasting is the making and sending out of television and radio programmes.
- broca's area — the region of the cerebral cortex of the brain concerned with speech; the speech centre
- bronchospasm — an abnormal contraction of the bronchi resulting in restriction of the airway