12-letter words containing a, p, t, o
- 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.
- bypass ratio — the ratio of the amount of air that bypasses the combustion chambers of an aircraft gas turbine to that passing through them
- caloreceptor — a receptor stimulated by heat.
- camp bastion — a large British military base in Helmand province, Afghanistan, built in 2006
- camphor tree — a lauraceous evergreen E Asian tree, Cinnamomum camphora, whose aromatic wood yields camphor
- camphorating — Present participle of camphorate.
- canton crepe — a fine crinkled silk or rayon crepe fabric, slightly heavier than crepe de Chine
- capacitation — to make capable; enable.
- cape ortegal — a cape in NW Spain, projecting into the Bay of Biscay
- cape-lookout — Cape, a sandy reef in the Outer Banks, off E North Carolina, SW of Cape Hatteras: lighthouse.
- capital cost — a cost incurred on the purchase of land, buildings, construction and equipment to be used in the production of goods or the rendering of services
- capital loss — A capital loss is a loss on investment property.
- capitol hill — the area around the Capitol in Washington, DC
- capitol peak — a mountain in W central Colorado, in the Elk range of the Rocky Mountains. 14,130 feet (4310 meters).
- capitulation — the act of capitulating
- capitulatory — the act of capitulating.
- captiousness — The state of being captious.
- cargo pocket — a large patch pocket, usually pleated at the sides and often having a flap.
- carpetmonger — a person who frequently visits women's boudoirs
- cartographer — A cartographer is a person whose job is drawing maps.
- cartographic — Of or pertaining to the making of maps.
- castile soap — a hard soap made from olive oil and sodium hydroxide
- catadioptric — involving a combination of reflecting and refracting components
- cataphoreses — Plural form of cataphoresis.
- cataphoresis — electrophoresis
- catastrophal — (rare) Catastrophic.
- catastrophes — Plural form of catastrophe.
- catastrophic — Something that is catastrophic involves or causes a sudden terrible disaster.
- catch points — railway points designed to derail a train running back in the wrong direction to prevent collision with a following train
- cathodograph — a picture taken using cathode rays
- cattleperson — Someone who works with, or rears cattle.
- cephalometer — an instrument for positioning the human head for X-ray examination in cephalometry
- cephalometry — measurement of the dimensions of the human head by radiography: used mainly in orthodontics
- ceratopsians — Plural form of ceratopsian.
- cerebropathy — A hypochondriacal condition verging upon insanity, occurring in those whose brains have been unduly taxed.
- ceroplastics — the art of wax modelling
- chalcopyrite — a widely distributed yellow mineral consisting of a sulphide of copper and iron in tetragonal crystalline form: the principal ore of copper. Formula: CuFeS2
- change point — a point to which a foresight and backsight are taken in levelling; turning point
- changepocket — a small pocket or compartment for holding coins.
- channel port — one of the English or French ports on the English Channel
- 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
- chapter room — a room for the use of the chapter of a religious institution
- chapter stop — any of several markers placed at intervals on a DVD film, enabling the viewer to find and select particular scenes
- chapterhouse — the building attached to a cathedral, collegiate church, or religious house in which the chapter meets
- charity shop — A charity shop is a shop that sells used goods cheaply and gives its profits to a charity.
- chart topper — a singer, band or video that comes top in the charts
- chartophylax — an official who serves chiefly as the chancellor and archivist of a diocese.
- cheiloplasty — plastic surgery of the lip.
- chemotherapy — Chemotherapy is the treatment of disease using chemicals. It is often used in treating cancer.