12-letter words containing o, k, a
- bank holiday — A bank holiday is a public holiday.
- bank robbery — theft from a bank
- bank swallow — a swallow, Riparia riparia, of the Northern Hemisphere, that nests in tunnels dug in sand or clay banks.
- banksia rose — a climbing rose, Rosa banksiae, native to China, having long, serrated leaves and white or yellow flowers.
- barking frog — a robber frog, Hylactophryne augusti, of Texas, New Mexico, and Mexico, having a call like a dog's bark.
- barrack room — a room inside a military barracks, esp one in which soldiers sleep
- bashi-bazouk — a member of the notoriously brutal 19th-cent. Turkish irregulars
- bashibazouks — Plural form of bashibazouk.
- beta blocker — A beta blocker is a drug which is used to treat people who have high blood pressure or heart problems.
- beta-blocker — any of various substances that interfere with the action of the beta receptors: used primarily to reduce the heart rate or force in the prevention, management, or treatment of angina, hypertension, or arrythmias.
- black bottom — a dance of the late 1920s that originated in America, involving a sinuous rotation of the hips
- black bryony — a climbing herbaceous Eurasian plant, Tamus communis, having small greenish flowers and poisonous red berries: family Dioscoreaceae
- black canyon — a canyon of the Colorado River between Arizona and Nevada: site of Boulder Dam.
- black coffee — coffee with no milk, milk substitute, or cream added
- black cohosh — a plant of the ranunculaceous family, Cimicifuga racemosa, which is used as a natural alternative to hormone replacement therapy
- black comedy — a comedy dealing with an unpleasant situation in a pessimistic or macabre manner
- black copper — a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores.
- black cosmos — a garden plant, Cosmos diversifolius, of Mexico, having small, dahlialike tubers and solitary flower heads with red disk flowers and velvety, dark-red or purplish ray flowers.
- 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 heroin — a very potent and addictive form of heroin that is dark-colored.
- black liquor — (in making wood pulp for paper) the liquor that remains after digestion.
- black locust — Also called false acacia, yellow locust. a North American tree, Robinia pseudoacacia, of the legume family, having pinnate leaves and clusters of fragrant white flowers.
- black poplar — a Eurasian tree, Populus nigra
- black powder — gunpowder as used in sports involving modern muzzleloading firearms
- black sapote — a tropical American tree, Diospyros digyna, related to the persimmon, having sweet, edible, green fruit that turns black when ripe.
- black scoter — a scoter of Eurasia and North America, Melanitta nigra, the adult male of which is black.
- black tongue — canine pellagra.
- black-coated — (esp formerly) (of a worker) clerical or professional, as distinguished from commercial or industrial
- blanket roll — a blanket or sleeping bag rolled into a cylindrical pack for easy carrying and outdoor use by hikers, soldiers, cowboys, etc., often with cooking utensils, food, and personal articles carried inside.
- blanket toss — a game in which a person is repeatedly tossed into the air and caught on an open blanket by a group of people who hold the blanket at its edges and stretch and relax it for each toss and catch.
- block caving — a method of mining a large block of ore by systematically undercutting so the ore will cave. Compare cave (def 5a).
- 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.
- block island — an island off the coast of and a part of Rhode Island, at the E entrance to Long Island Sound.
- block signal — a fixed railroad signal governing the movements of trains entering and using a given section of track.
- boating lake — a lake in a park where rowing boats can be hired
- bobbery pack — a mixed pack of hunting dogs, often not belonging to any of the hound breeds
- boilermaking — metal-working in heavy industry; plating or welding
- book matches — safety matches made of paper and fastened into a small cardboard folder
- booklet pane — Philately. any of a number of panes or small pages of postage stamps, stapled together into a booklet for the convenience of users.
- bottom break — a branch coming from the bottom of a plant stem, usually formed by pinching and disbudding.
- bottom quark — a type of quark with a mass of c. 4.7 to 5.3 GeV/c2, a negative charge that is 1⁄3 the charge of an electron, zero charm, and zero strangeness
- bracket foot — a corner foot of a chest or the like joining the sides in a concave line.
- break ground — to do something that has not been done before
- break of day — dawn; daybreak.
- breaker zone — the area offshore where waves break, between the outermost breaker and the limit of wave uprush; the zone within which waves approaching the coastline start breaking, usually in water depths of 16 to 32 feet (5 to 10 meters).
- breakthrough — A breakthrough is an important development or achievement.
- breaststroke — Breaststroke is a swimming stroke which you do lying on your front, moving your arms and legs horizontally in a circular motion.
- broken arrow — a town in NE Oklahoma.
- broken heart — If you say that someone has a broken heart, you mean that they are very sad, for example because a love affair has ended unhappily.