16-letter words containing e, p, s, o
- upside-down cake — a cake that is baked on a layer of fruit, then turned before serving so that the fruit is on top.
- upsilon particle — the 20th letter of the Greek alphabet (Υ, υ).
- vegetable sponge — loofah (def 2).
- verneuil process — a process for making synthetic rubies, sapphires, spinels, etc., by the fusion at high temperatures of powdered compounds.
- vest-pocket park — pocket park.
- videodisc player — an electronic device for playing videodiscs through a television set.
- watch one's step — a movement made by lifting the foot and setting it down again in a new position, accompanied by a shifting of the weight of the body in the direction of the new position, as in walking, running, or dancing.
- well-compensated — to recompense for something: They gave him ten dollars to compensate him for his trouble.
- well-upholstered — (of a person) fat
- will-o'-the-wisp — ignis fatuus (def 1).
- windowpane shell — capiz.
- work-in-progress — In book-keeping, work-in-progress refers to the monetary value of work that has not yet been paid for because it has not yet been completed.
- world exposition — world's fair.
- writ of subpoena — a legal document commanding the attendance in court, as a witness, of the person on whom it is served, under a penalty
- xenotransplanted — Transplanted by xenotransplantation.
- zenith telescope — a telescope mounted to point only at the zenith, used at some observatories for measuring time by the stars.