12-letter words containing o, r, a, i
- black liquor — (in making wood pulp for paper) the liquor that remains after digestion.
- bletheration — nonsense!
- boar-hunting — the practice of hunting wild boars
- boarding out — the local-authority practice of placing a client in a foster family or voluntary establishment and paying for it
- boardsailing — windsurfing
- boating trip — a trip or holiday in a boat such as a sailing boat or canal boat
- body repairs — repairs to the bodywork of cars
- bodyboarding — the sport of surfing using a bodyboard
- boilermaking — metal-working in heavy industry; plating or welding
- boogie board — a small, flexible plastic surfboard, ridden lying down.
- boolean ring — a nonempty collection of sets having the properties that the union of two sets of the collection is a set in the collection and that the relative complement of each set with respect to any other set is in the collection.
- boomeranging — a bent or curved piece of tough wood used by the Australian Aborigines as a throwing club, one form of which can be thrown so as to return to the thrower.
- born-digital — relating to or noting documents, images, etc., that are created and managed in electronic form: electronic preservation of born-digital content; a born-digital e-book that will not be available in print.
- borosilicate — a salt of boric and silicic acids
- boulangerite — a bluish lead-gray mineral, lead antimony sulfide, Pb 5 Sb 4 S 11 , a minor ore of lead.
- boulevardier — (originally in Paris) a fashionable man, esp one who frequents public places
- braggadocios — empty boasting; bragging.
- brain tumour — a tumour that is situated in the brain
- brainstormer — a person who brainstorms
- branch point — Electricity. a point in an electric network at which three or more conductors meet.
- bring action — to start a lawsuit
- bring around — If you bring someone around when they are unconscious, you make them become conscious again.
- bring to bay — to force into a position from which retreat is impossible
- brisbane box — a broad-leaved evergreen tree, Tristania conferta, native to Australia, having a deciduous outer bark.
- broad-minded — If you describe someone as broad-minded, you approve of them because they are willing to accept types of behaviour which other people consider immoral.
- broadcasting — Broadcasting is the making and sending out of television and radio programmes.
- brown bag it — to bring (one's own liquor) to a restaurant or club, especially one that has no liquor license.
- buenos aires — the capital of Argentina, a major port and industrial city on the Río de la Plata estuary: became capital in 1880; university (1821). Pop: 13 349 000 (2005 est)
- buffalo bird — a cowbird, Molothrus ater, of North America.
- bunco artist — a confidence trickster or con artist
- bur marigold — any plant of the genus Bidens that has yellow flowers and pointed fruits that cling to fur and clothing: family Asteraceae (composites)
- burial mound — a barrow
- burkina faso — an inland republic in W Africa: dominated by Mossi kingdoms (10th–19th centuries); French protectorate established in 1896; became an independent republic in 1960; consists mainly of a flat savanna plateau. Official language: French; Mossi and other African languages also widely spoken. Religion: mostly animist, with a large Muslim minority. Currency: franc. Capital: Ouagadougou. Pop: 17 812 961 (2013 est). Area: 273 200 sq km (105 900 sq miles)
- burro's tail — a succulent Mexican plant, Sedum morganianum, of the stonecrop family, bearing small, rose-colored flowers and long, hanging, nearly cylindrical stems with closely packed whitish-green leaves.
- byelorussian — Byelorussian means belonging or relating to Byelorussia or to its people or culture.
- bypass ratio — the ratio of the amount of air that bypasses the combustion chambers of an aircraft gas turbine to that passing through them
- cabot strait — a channel in Canada, connecting the Gulf of St. Lawrence with the Atlantic Ocean. 68 miles (109 km) wide.
- cabriole leg — a type of furniture leg, popular in the first half of the 18th century, in which an upper convex curve descends tapering to a concave curve
- cachinnatory — Pertaining to loud or immoderate laughter.
- calibrations — Plural form of calibration.
- calorie-free — containing no calories
- calorimeters — Plural form of calorimeter.
- calorimetric — the measurement of heat.
- calumniators — Plural form of calumniator.
- calumniatory — of, involving, or using calumny; slanderous; defamatory.
- camphorating — Present participle of camphorate.
- campo formio — a village in NE Italy, in Friuli-Venezia Giulia: scene of the signing of a treaty in 1797 that ended the war between revolutionary France and Austria
- campodeiform — resembling insects of the genus Campodea
- cancerphobia — an excessive fear of getting cancer
- canine corps — a military or law enforcement body which uses dogs for the detection of explosives or drugs or for security, tracking, etc