10-letter words containing o, a, k, c
- black bloc — an informal grouping of militant, mainly anarchist, protesters who act together during anti-capitalism, anti-war, etc, protests, often wearing black hoods and black clothing
- black body — a hypothetical body that would be capable of absorbing all the electromagnetic radiation falling on it
- black book — a book containing the names of people to be punished, blacklisted, etc
- black code — any code of law that defined and especially limited the rights of former slaves after the Civil War.
- black gold — petroleum
- black hole — Black holes are areas in space, where gravity is so strong that nothing, not even light, can escape from them. Black holes are thought to be formed by collapsed stars.
- black knot — a fungal disease of plums and cherries caused by Dibotryon morbosum, characterized by rough black knotlike swellings on the twigs and branches
- black look — If someone gives you a black look, they look at you in a way that shows that they are very angry about something.
- black mold — any fungus of the family Mucoraceae, especially Rhizopus nigricans, that forms a black, furry coating on foodstuffs.
- black monk — a Benedictine monk
- black opal — any opal of a dark coloration, not necessarily black
- black pope — the head of the Jesuit order (so called from the power he once possessed and from the black habit worn by the order).
- black spot — If you describe a place, time, or part of a situation as a black spot, you mean that it is particularly bad or likely to cause problems.
- blackamoor — a Black African or other person with dark skin
- blackboard — A blackboard is a dark-coloured board that you can write on with chalk. Blackboards are often used by teachers in the classroom.
- blackstone — Sir William. 1723–80, English jurist noted particularly for his Commentaries on the Laws of England (1765–69), which had a profound influence on jurisprudence in the US
- blackthorn — a thorny Eurasian rosaceous shrub, Prunus spinosa, with black twigs, white flowers, and small sour plumlike fruits
- block coal — bituminous coal that breaks into large lumps or cubical blocks.
- block lava — volcanic lava occurring as rough-surfaced jagged blocks
- block mast — a short mast from the head of which a lateen yard is suspended.
- blockboard — a type of plywood in which soft wood strips are bonded together and sandwiched between two layers of veneer
- body track — the tracks of a railroad yard used for switching or sorting cars.
- bone black — a fine charcoal made by burning animal bones in closed containers: used as a pigment, in refining sugar, etc.
- bonus pack — anything sold with a product and marketed as a useful and free extra
- book match — a match in or from a matchbook.
- bounceback — the act or an instance of bouncing back, recovering, or recuperating: Fall sales have experienced a tremendous bounceback.
- bulk cargo — unpackaged cargoes, such as grain or coal
- cabin hook — a hook and eye for fastening a cabinet door or the like.
- caipiroska — a cocktail drink containing vodka, lime juice, sugar, and crushed ice, based on the Caipirinha cocktail but with vodka replacing the Brazilian rum-like spirit Cachaça
- cake flour — finely ground wheat flour.
- calicoback — harlequin bug
- camerawork — The camerawork in a film is the way it has been filmed, especially if the style is interesting or unusual in some way.
- caney fork — a river in central Tennessee, flowing NW to the Cumberland River. 144 miles (232 km) long.
- cankerroot — goldthread.
- cankerworm — the larva of either of two geometrid moths, Paleacrita vernata or Alsophila pometaria, which feed on and destroy fruit and shade trees in North America
- cape smoke — South African brandy
- car-worker — a person who works in the car industry
- caseworker — A caseworker is someone who does casework.
- chaikovski — Peter Ilyich [il-yich] /ˈɪl yɪtʃ/ (Show IPA), Tchaikovsky, Peter Ilyich.
- chain-work — any decorative product, handiwork, etc., in which parts are looped or woven together, like the links of a chain.
- chalkboard — A chalkboard is a dark-coloured board that you can write on with chalk. Chalkboards are often used by teachers in the classroom.
- chalkstone — tophus
- cheboksary — a port in W central Russia on the River Volga: capital of the Chuvash Republic. Pop: 446 000 (2005 est)
- chekhovian — of, relating to, or characteristic of Anton Chekhov or his writings, especially as they are evocative of a mood of introspection and frustration.
- choke back — If you choke back tears or a strong emotion, you force yourself not to show your emotion.
- chowkidars — Plural form of chowkidar.
- chroma key — an electronic special-effects system for combining a desired background with live foreground action.
- chuckwagon — A wagon equipped with food and cooking utensils, as on a ranch or in a lumber camp.
- clark fork — river flowing from W Mont. northwest into Pend Oreille Lake in N Ida.: c. 300 mi (483 km)
- class book — a book published by members of a school or college class, containing pictures of students and teachers, an account of student activities, etc.