9-letter words containing o, a, k
- białystok — a city in E Poland: belonged to Prussia (1795–1807) and to Russia (1807–1919). Pop: 315 000 (2005 est)
- biomarker — a distinct biochemical, genetic, or molecular characteristic or substance that is an indicator of a particular biological condition or process: a blood test to measure protein biomarkers for cancer.
- black box — A black box is an electronic device in an aircraft which records information about its flights. Black boxes are often used to provide evidence about accidents.
- black cow — Midwestern U.S. a root beer float containing vanilla ice cream.
- black dog — depression or melancholy
- black fog — (in Cape Cod, Mass.) a dense fog.
- black fox — a red fox in a color phase in which its fur is mostly black.
- black oak — any of various North American oaks (esp. Quercus velutina) with dark bark or foliage
- black out — If you black out, you lose consciousness for a short time.
- black rod — (in Britain) an officer of the House of Lords and of the Order of the Garter, whose main duty is summoning the Commons at the opening and proroguing of Parliament
- black rot — any of various plant diseases of fruits and vegetables, producing blackening, rotting, and shrivelling and caused by bacteria (including Xanthomonas campestris) and fungi (such as Physalospora malorum)
- blackbody — a hypothetical body that would be capable of absorbing all the electromagnetic radiation falling on it
- blackcock — the male of the black grouse
- blackfoot — a member of a group of Native American peoples formerly living in the northwestern Plains
- blackmore — R(ichard) D(oddridge). 1825–1900, English novelist; author of Lorna Doone (1869)
- blackpoll — a North American warbler, Dendroica striata, the male of which has a black-and-white head
- blackpool — a town and resort in NW England, in Blackpool unitary authority, Lancashire on the Irish Sea: famous for its tower, 158 m (518 ft) high, and its illuminations. Pop: 142 283 (2001)
- blacktown — a city in New South Wales, SE Australia, near Sydney.
- blackwood — a tall Australian acacia tree, A. melanoxylon, having small clusters of flowers and curved pods and yielding highly valued black timber
- blackwork — embroidery done with black, usually silk, thread on white fabric, especially linen.
- bladework — skilful use of a blade, esp with reference to rowing
- blank out — If you blank out a particular feeling or thought, you do not allow yourself to experience that feeling or to have that thought.
- blankbook — a book containing blank pages, as a notebook or sketchbook.
- blockable — able to be blocked or prevented
- blockaded — the isolating, closing off, or surrounding of a place, as a port, harbor, or city, by hostile ships or troops to prevent entrance or exit.
- blockhead — a stupid person
- blow-back — Blow-back is when the air flow through a carburetor suddenly changes direction. This is often caused by incorrect ignition.
- boardlike — resembling a board
- boardwalk — A boardwalk is a path made of wooden boards, especially one along a beach.
- boat deck — the deck of a ship on which the lifeboats are kept
- boat hook — a hook mounted at the end of a pole, used to pull or push boats toward or away from a landing, to pick up a mooring, etc.
- boat neck — a high slitlike neckline of a garment that extends onto the shoulders
- bob skate — an ice skate with two parallel blades
- boghazkoy — a village in N central Turkey: site of the ancient Hittite city of Hattusas.
- bokassa i — original name Jean Bedel Bokassa. 1921–96, president of the Central African Republic (1972–76); emperor of the renamed Central African Empire from 1976 until overthrown in 1979
- bomb rack — a device for carrying bombs in or under the fuselage of an aircraft.
- boneblack — a black residue from the destructive distillation of bones, containing about 10 per cent carbon and 80 per cent calcium phosphate, used as a decolorizing agent and pigment
- boobquake — a Facebook campaign created to disprove the contention of an Iranian cleric that immodestly dressed women cause earthquakes
- book fair — a commercial event at which publishers exhibit and trade books
- bookcraft — literary skill; authorship.
- bookmaker — A bookmaker is a person whose job is to take your money when you bet and to pay you money if you win.
- bookmarks — a ribbon or other marker placed between the pages of a book to mark a place.
- bookpaper — the paper used in printing books, especially when of superior quality.
- bookplate — A bookplate is a piece of decorated paper which is stuck in the front of a book and on which the owner's name is printed or written.
- bookstack — Usually, bookstacks. stack (def 4).
- bookstall — A bookstall is a long table from which books and magazines are sold, for example at a conference or in a street market.
- bookstand — a cradle for holding an open book so that it may be read comfortably
- bootblack — a person whose work is shining shoes and boots
- bootmaker — a person who makes boots and shoes for a living
- bop stack — A BOP stack is one of two or more units which control well pressure, and contain the wellhead and blowout preventers.