12-letter words containing p, a, b, o
- benzal group — the bivalent group C 7 H 6 –, derived from benzaldehyde.
- benzoapyrene — a carcinogenic chemical in tobacco smoke
- betanaphthol — a colorless, crystalline isomer of naphthol, C10H8O, used as an antiseptic and parasiticide
- bibliography — A bibliography is a list of books on a particular subject.
- bibliophobia — an aversion to books
- biogeography — the branch of biology concerned with the geographical distribution of plants and animals
- biographical — Biographical facts, notes, or details are concerned with the events in someone's life.
- bipropellant — a rocket propellant consisting of two substances, usually a fuel and an oxidizer
- bishop's-cap — any of a genus (Mitella) of small woodland plants of the saxifrage family, with two-lobed seedcases shaped like a bishop's hat
- black copper — a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores.
- 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.
- blastosphere — blastula
- blood plasma — the pale yellow fluid portion of the blood; blood from which red and white blood cells and platelets have been removed
- blood sample — an amount of a person's blood taken from their body for use in medical tests
- blood spavin — a disease of the hock joint of horses in which enlargement occurs because of collected fluids (bog spavin) bony growth (bone spavin) or distention of the veins (blood spavin)
- blotting-pad — an object to one side of which a piece of blotting paper is attached for blotting text handwritten in ink
- boating trip — a trip or holiday in a boat such as a sailing boat or canal boat
- boatsmanship — seamanship as applied to boats, especially rowboats and motorboats.
- bobbery pack — a mixed pack of hunting dogs, often not belonging to any of the hound breeds
- body repairs — repairs to the bodywork of cars
- bog asphodel — either of two liliaceous plants, Narthecium ossifragum of Europe or N. americanum of North America, that grow in boggy places and have small yellow flowers and grasslike leaves
- boobytrapped — to set with or as if with a booby trap; attach a booby trap to or in.
- 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.
- 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
- bootleg play — a play in which the quarterback pretends to hand the ball to a teammate, hides it by placing it next to his hip, and runs with it.
- bottle party — a party to which guests bring drink
- branch depot — one of a several depots receiving stock from the same central supplier
- branch point — Electricity. a point in an electric network at which three or more conductors meet.
- breastplough — a plough driven by the worker's breast, often used to pare turf
- breath group — a sequence of sounds articulated in the course of a single exhalation; an utterance or part of an utterance produced between pauses for breath.
- broad jumper — a participant in the long jump.
- bronchospasm — an abnormal contraction of the bronchi resulting in restriction of the airway
- burglarproof — safeguarded or secure against burglary.
- bypass ratio — the ratio of the amount of air that bypasses the combustion chambers of an aircraft gas turbine to that passing through them
- camp bastion — a large British military base in Helmand province, Afghanistan, built in 2006
- camphor ball — mothball
- cancerphobia — an excessive fear of getting cancer
- cape buffalo — a large, black, nearly hairless, very fierce buffalo (Syncerus caffer) of South Africa, with horns joined at the bases to form a helmetlike structure
- cape cod bay — a part of Massachusetts Bay, enclosed by the Cape Cod peninsula.
- capped elbow — a swelling of the elbow of a horse due to irritation caused by the hoof striking the elbow when lying down.
- carbon paper — Carbon paper is thin paper with a dark substance on one side. You use it to make copies of letters, bills, and other papers.
- cardiophobia — An inordinate fear of heart disease.
- cebocephalic — Exhibiting or relating to cebocephaly.
- cerebropathy — A hypochondriacal condition verging upon insanity, occurring in those whose brains have been unduly taxed.
- chapter book — a children's book, typically a work of fiction, of moderate length and complexity, divided into chapters and intended for readers approximately seven to ten years old
- chromophobia — Lb biology The quality of being resistant to staining.
- chronophobia — Fear of the passing of time, or more generally of time itself.
- clapboarding — Present participle of clapboard.