18-letter words containing c, l, a, p, y
- root canal therapy — endodontics.
- rural municipality — any lightly settled area in Canada lacking a local elected government and administered directly by a provincial government.
- sampling frequency — sample rate
- secondary syphilis — the second stage of syphilis, characterized by eruptions of the skin and mucous membrane.
- self-deprecatingly — in a self-deprecating manner
- sociopsychological — of, relating to, or characterized by interrelated social and psychological factors.
- special relativity — the state or fact of being relative.
- spectroheliography — the process of obtaining an image of the sun in light of a particular wavelength, such as calcium or hydrogen, showing the distribution of the element over the surface and in the solar atmosphere, using a spectroheliograph
- spherical geometry — the branch of geometry that deals with figures on spherical surfaces.
- spotted flycatcher — a European woodland songbird, Muscicapa striata, with a greyish-brown streaked plumage: family Muscicapidae (Old World flycatchers)
- super royal octavo — a book size, 63⁄4 by 101⁄4 inches
- superciliary ridge — browridge.
- television company — a company that broadcasts programmes by television
- the family compact — the ruling oligarchy in Upper Canada in the early 19th century
- the-cocktail-party — a play in verse (1950) by T. S. Eliot.
- to hold your peace — If you hold or keep your peace, you do not speak, even though there is something you want or ought to say.
- traditional policy — a life assurance policy in which the policyholder's premiums are paid into a general fund and his or her investment benefits are calculated according to actuarial formulae