15-letter words containing a, d, o, p, t
- special edition — newspaper, magazine: extra issue
- speed indicator — an instrument for counting the number of revolutions of a gasoline engine.
- sphaerosiderite — a type of siderite
- spheroidization — the conversion of grains into spheroids
- spit and polish — great care in maintaining smart appearance and crisp efficiency: The commander was concerned more with spit and polish than with the company's morale.
- spotted cowbane — a North American water hemlock, Cicuta maculata, of the parsley family, having a purple-mottled stem, white flowers, and deadly poisonous, tuberlike roots.
- spread the word — make others aware
- stamping ground — a habitual or favorite haunt.
- stand-up comedy — telling jokes to an audience
- studio portrait — a photograph of a person taken in a studio
- 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
- take down a peg — to lower the pride or conceit of; humble or dispirit
- talcum (powder) — a powder for the body and face made of powdered, purified talc, usually perfumed
- tandem-compound — (of a compound engine or turbine) having high-pressure and low-pressure units in tandem.
- the perigordian — the Perigordian culture
- to sow gapeseed — to stare in a gaping manner instead of attending to business
- 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
- undercompensate — to compensate or pay less than is fair, customary, or expected.
- underpopulation — having a population lower than is normal or desirable.
- undisappointing — not disappointing
- unleaded petrol — petrol containing a reduced amount of tetraethyl lead
- unsophisticated — not sophisticated; simple; artless.
- 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.
- wind-pollinated — being pollinated by airborne pollen.
- windfall profit — a profit that arises thanks to an external event over which the person profiting had no control