15-letter words containing c, o, m, s
- bituminous coal — a soft black coal, rich in volatile hydrocarbons, that burns with a smoky yellow flame. Fixed carbon content: 46–86 per cent; calorific value: 1.93 × 107 – 3.63 × 107 J/kg
- black mountains — a mountain range running from N Monmouthshire and SE Powys (Wales) to SW Herefordshire (England). Highest peak: Waun Fach, 811 m (2660 ft)
- blueback salmon — sockeye salmon.
- boom-bust cycle — A boom-bust cycle is a series of events in which a rapid increase in business activity in the economy is followed by a rapid decrease in business activity, and this process is repeated again and again.
- boston massacre — an outbreak (1770) in Boston against British troops, in which a few citizens were killed
- box the compass — to name the compass points in order
- brachystomatous — having a short proboscis, as certain insects.
- british telecom — the popular name for British Telecommunications Group plc, the dominant fixed line telecommunications and broadband internet provider in the United Kingdom
- broadcast storm — (networking) A broadcast on a network that causes multiple hosts to respond by broadcasting themselves, causing the storm to grow exponentially in severity. See network meltdown.
- bromoil process — a process for making an offset reproduction by first making a photographic print on paper with a silver bromide emulsion, wetting it, and then using it as a lithographic plate, the lighter parts of the emulsion tending to repel the oil base of the ink and the darker parts tending to hold it.
- butcher's-broom — a liliaceous evergreen shrub, Ruscus aculeatus, that has stiff prickle-tipped flattened green stems, which resemble and function as true leaves. The plant was formerly used for making brooms
- cairngorm-stone — smoky quartz.
- camp counsellor — an adult supervisor assigned to a group of campers at a summer camp
- canada moonseed — a vine, Menispermum canadense, of eastern North America, having variable leaves and black, grapelike fruit.
- capitulationism — advocacy or approval of capitulation.
- carcinosarcomas — Plural form of carcinosarcoma.
- carpometacarpus — a bone in the wing of a bird that consists of the metacarpal bones and some of the carpal bones fused together
- casement-window — a window sash opening on hinges that are generally attached to the upright side of its frame.
- cassette memory — a removable magnetic tape cartridge that stores data and programs.
- castanospermine — a substance obtained from the Australian chestnut or black bean tree
- casters-up mode — [IBM, probably from slang belly up] Yet another synonym for "broken" or "down". Usually connotes a major failure. A system (hardware or software) which is "down" may be already being restarted before the failure is noticed, whereas one which is "casters up" is usually a good excuse to take the rest of the day off (as long as you're not responsible for fixing it).
- castrametations — Plural form of castrametation.
- centrosymmetric — having symmetry with a central point
- ceremoniousness — The state of being ceremonious.
- chamber counsel — a counsel who advises in private and does not plead in court
- chamois leather — soft cleaning cloth
- chanson d'amour — love song.
- charles coulomb — Charles Augustin de [sharl oh-gy-stan duh] /ʃarl oʊ güˈstɛ̃ də/ (Show IPA), 1736–1806, French physicist and inventor.
- charles simonyi — (person) Microsoft programmer, most famously responsible for Hungarian Notation. Simonyi was born in Budapest in 1948, and for more than a decade was senior programmer at Microsoft in Redmond.
- charm offensive — If you say that someone has launched a charm offensive, you disapprove of the fact that they are being very friendly to their opponents or people who are causing problems for them.
- chef de mission — the head of a diplomatic body
- chemoautotrophs — Plural form of chemoautotroph.
- chemopsychiatry — the study and application of chemical substances in psychiatry
- chemosterilants — Plural form of chemosterilant.
- chemotaxonomist — a specialist in the field of chemotaxonomy
- children's home — care institution for minors
- chimney swallow — another name for common swallow
- cholecystectomy — surgical removal of the gall bladder
- cholecystostomy — a medical cut or opening into the gall bladder to enable a drainage tube to be put in place
- choledochostomy — formation of a temporary opening through the abdominal wall into the common bile duct, usually to remove stones.
- cholesterolemia — the presence of an abnormal amount of cholesterol in the blood.
- chondrosarcomas — Plural form of chondrosarcoma.
- chopped almonds — almonds cut into small pieces
- christmas carol — a joyful hymn or religious song, celebrating the birth of Christ
- chromatic scale — a twelve-note scale including all the semitones of the octave
- chromosome band — any of the transverse bands that appear on a chromosome after staining. The banding pattern is unique to each type of chromosome, allowing characterization
- cigarette smoke — the acrid smoke produced by cigarettes being smoked
- circumambagious — in a round-about manner
- circumforaneous — moving around or abroad; roaming from place to place
- circumincession — the reciprocal existence within the three members of the Trinity