12-letter words containing a, c, r, b
- bismarck sea — an arm of the Pacific Ocean north of New Britain and north-east of New Guinea
- black africa — Black Africa is the part of Africa to the south of the Sahara Desert.
- black bryony — a climbing herbaceous Eurasian plant, Tamus communis, having small greenish flowers and poisonous red berries: family Dioscoreaceae
- black butter — beurre noir.
- black cherry — a tree of the species Prunus serotina, having a small fleshy rounded edible fruit containing a hard stone
- black copper — a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores.
- black forest — wooded mountain region in SW Germany
- black friday — the day after the US Thanksgiving Day in late November, regarded as the start of the Christmas shopping season
- black grouse — a large N European grouse, Lyrurus tetrix, the male of which has a bluish-black plumage and lyre-shaped tail
- black heroin — a very potent and addictive form of heroin that is dark-colored.
- black letter — a kind of heavy-faced, ornamental printing type
- black liquor — (in making wood pulp for paper) the liquor that remains after digestion.
- black market — If something is bought or sold on the black market, it is bought or sold illegally.
- black papers — unofficial papers criticizing government policy
- black pepper — Black pepper is pepper which is dark in colour and has been made from the dried berries of the pepper plant, including their black outer cases.
- black pewter — pewter composed of 60 percent tin and 40 percent lead.
- black poplar — a Eurasian tree, Populus nigra
- black powder — gunpowder as used in sports involving modern muzzleloading firearms
- black prince — Edward2 (Prince of Wales)
- black scoter — a scoter of Eurasia and North America, Melanitta nigra, the adult male of which is black.
- black spruce — a coniferous tree, Picea mariana, of the northern regions of North America, growing mostly in cold bogs and having dark green needles
- black stream — a warm ocean current in the Pacific, flowing N along the E coast of Taiwan, NE along the E coast of Japan, and continuing in an easterly direction into the open Pacific.
- black sucker — a hog sucker, Hypentelium nigricans, of eastern U.S. streams.
- black-figure — pertaining to or designating a style of vase painting developed in Greece in the 7th and 6th centuries b.c., chiefly characterized by silhouetted figures painted in black slip on a red clay body, details incised into the design, and a two-dimensional structure of form and space.
- black-market — to black-marketeer.
- blackbirding — a common European thrush, Turdus merula, the male of which is black with a yellow bill.
- blackcurrant — In Europe, blackcurrants are a type of very small, dark purple fruits that grow in bunches on bushes.
- blackhearted — wicked; evil
- bladderwrack — any of several seaweeds of the genera Fucus and Ascophyllum, esp F. vesiculosus, that grow in the intertidal regions of rocky shores and have branched brown fronds with air bladders
- bliss carman — (William) Bliss, 1861–1929, Canadian poet and journalist in the U.S.
- blister pack — a type of packet in which small items are displayed and sold, consisting of a transparent dome of plastic or similar material mounted on a firm backing such as cardboard
- block heater — an electrically operated immersion heater fitted either to enter the water hose or the water jacket surrounding the cylinder block of a motor to warm the coolant in cold weather.
- board school — (formerly) a school managed by a board elected by local ratepayers
- bobbery pack — a mixed pack of hunting dogs, often not belonging to any of the hound breeds
- 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
- bomb factory — a site or building in which terrorists illicitly and secretly create bombs
- bonnyclabber — clotted or curdled milk
- 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
- borosilicate — a salt of boric and silicic acids
- boulder clay — an unstratified glacial deposit consisting of fine clay, boulders, and pebbles
- bound charge — any electric charge that is bound to an atom or molecule (opposed to free charge).
- bowel cancer — cancer of the colon
- box lacrosse — a form of lacrosse played indoors, usually on a hockey rink with a wooden floor, between two teams of six players.
- braced frame — a building frame employing a heavy, braced framework of solid girts mortised into solid posts the full height of the frame, with studs one story high filling the interstices.
- brachycephal — a person with a brachycephalic head
- brachycerous — (of insects) having short antennae
- brachycranic — having a cranial index of 81.0–85.4.
- brachygraphy — shorthand; stenography
- bracket foot — a corner foot of a chest or the like joining the sides in a concave line.
- bracket lamp — a wall light that is attached to the wall by a bracket