15-letter words containing a, d, p, r, o
- sphaerosiderite — a type of siderite
- spheroidization — the conversion of grains into spheroids
- spread the word — make others aware
- stamping ground — a habitual or favorite haunt.
- studio portrait — a photograph of a person taken in a studio
- sulphurous acid — an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3
- superordination — Logic. the relation between a universal proposition and a particular proposition of the same quality containing the same terms in the same order.
- sweep the board — (in gambling) to win all the cards or money
- talcum (powder) — a powder for the body and face made of powdered, purified talc, usually perfumed
- the perigordian — the Perigordian culture
- top dead center — Top dead center is the position of an engine's piston when it is at the very top of its stroke.
- top dead-centre — the position of the crank of a reciprocating engine or pump when the piston is at the top of its stroke
- total depravity — the Calvinist doctrine that humankind's entire nature, including its reason, is corrupt or sinful as a result of the Fall and that people are therefore completely dependent on God for regeneration.
- trading company — a company that is owned by the people who have bought shares in that company
- trading profits — profits made from the buying and selling of goods and services
- transportedness — the quality or state of being carried away with pleasure or rapture
- trapdoor spider — any of various, often large, spiders (esp. family Ctenizidae) that dig a burrow and cover the entrance with a hinged lid like a trapdoor
- una corda pedal — soft pedal (def 1).
- unchoreographed — not choreographed; not pre-arranged or pre-prepared; unplanned
- undercompensate — to compensate or pay less than is fair, customary, or expected.
- underpopulation — having a population lower than is normal or desirable.
- unleaded petrol — petrol containing a reduced amount of tetraethyl lead
- upward mobility — movement from one social level to a higher one (upward mobility) or a lower one (downward mobility) as by changing jobs or marrying.
- upwardly mobile — See under vertical mobility (def 1).
- uropygial gland — a gland opening on the back at the base of the tail in most birds that secretes an oily fluid used by the bird in preening its feathers.
- windfall profit — a profit that arises thanks to an external event over which the person profiting had no control
- wraparound care — a childcare facility intended to help working parents, in which young children are looked after before and after school
- xeroradiography — an x-ray utilizing a specially coated plate that allows a picture to be developed without the use of liquid chemicals.