18-letter words containing a, c, r, o, p, l
- subatomic particle — physics:
- super royal octavo — a book size, 63⁄4 by 101⁄4 inches
- the-cocktail-party — a play in verse (1950) by T. S. Eliot.
- thiosulphuric acid — an unstable acid known only in solutions and in the form of its salts. Formula: H2S2O3
- to all appearances — apparently
- 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.
- to scrape a living — If you say that someone scrapes a living or scratches a living, you mean that they manage to earn enough to live on, but it is very difficult. In American English, you say they scrape out a living or scratch out a living.
- 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
- universal coupling — a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.
- upper palaeolithic — the latest of the three periods of the Palaeolithic, beginning about 40 000 bc and ending, in Europe, about 12 000 bc: characterized by the emergence of modern man, Homo sapiens
- world championship — an international competition in a particular sport or activity for people all around the world