12-letter words containing o, u
- bifunctional — having two functions
- big-sounding — meant to be impressive in scale
- billow cloud — a cloud consisting of broad, parallel bands oriented perpendicularly to the wind.
- binocularity — binocular characteristics
- bio-security — the precautions taken to protect against the spread of lethal or harmful organisms and diseases
- bioacoustics — the study of animals' use of sound
- biocomputing — the application of computing to problems in biology, biochemistry, and genetics
- biohazardous — a pathogen, especially one used in or produced by biological research.
- biomolecular — relating to a biomolecule
- bioturbation — the stirring of sediment by organisms
- bird's mouth — a right-angled notch cut in the underside of a rafter for fitting over a longitudinal member, as a wall plate.
- bit of fluff — a girl or young woman
- biting louse — any wingless insect of the order Mallophaga, such as the chicken louse: external parasites of birds and mammals with biting mouthparts
- blabbermouth — a person who talks too much or indiscreetly
- black grouse — a large N European grouse, Lyrurus tetrix, the male of which has a bluish-black plumage and lyre-shaped tail
- 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 tongue — canine pellagra.
- blastulation — the process of blastula formation
- blockbusting — A blockbusting film or book is one that is very successful, usually because it is very exciting.
- blood supply — the flow of blood to different parts of the body
- blood volume — the total quantity of blood in the body
- bloodcurdler — something causing great fright or horror: a bloodcurdler of a mystery novel.
- bloodsucking — any animal that sucks blood, especially a leech.
- blow through — to leave; make off
- blue dogwood — a shrub or small tree, Cornus alternifolia, of eastern North America, having clusters of white flowers and bluish fruit.
- blue melilot — a European plant, Trigonella caerulea, of the legume family, having long-stalked clusters of blue and white flowers.
- blue norther — a cold north wind that brings rapidly falling temperatures.
- blue pointer — a large shark, Isuropsis mako, of Australian coastal waters, having a blue back and pointed snout
- blue stilton — a rich cheese made from whole milk, blue-veined and very strong in flavour
- blue succory — a composite garden plant, Catananche caerulea, of southern Europe, having very hairy leaves and blue flower heads, used by the ancients as a love potion.
- blue vitriol — the fully hydrated blue crystalline form of copper sulphate
- blue-blooded — A blue-blooded person is from a royal or noble family.
- blue-on-blue — of or relating to friendly fire
- bluestocking — A bluestocking is an intellectual woman.
- 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
- boatbuilding — Boatbuilding is the craft or industry of making boats.
- bodybuilding — Bodybuilding is the activity of doing special exercises regularly in order to make your muscles grow bigger.
- boiler house — a building housing a boiler
- boisterously — rough and noisy; noisily jolly or rowdy; clamorous; unrestrained: the sound of boisterous laughter.
- bolt upright — If someone is sitting or standing bolt upright, they are sitting or standing very straight.
- bombacaceous — of, relating to, or belonging to the Bombacaceae, a family of tropical trees, including the kapok tree and baobab, that have very thick stems, often with water-storing tissue
- bonne bouche — a tasty titbit or morsel
- bonnet rouge — a red cap worn by ardent supporters of the French Revolution
- bonus number — (in the National Lottery) a number announced after the normal six numbers which influences the amount of prize money paid
- bonus scheme — a scheme in a company or other organization according to which employees receive a bonus if they meet specified targets
- book burning — the destruction of writings of which the subject, the view of the author, or the like is considered politically or socially objectionable: used as a means of censorship or oppression.
- boom-or-bust — boom-and-bust.
- booster pump — A booster pump is a pump which is used where pressure is low and needs to be increased.