16-letter words containing p, e, r, i, n, a
- underpitch vault — a construction having a central vault intersected by vaults of lower pitch.
- unimpressionable — easily impressed or influenced; susceptible: an impressionable youngster.
- unimproved value — the valuation of land for rating purposes, disregarding the value of buildings or other development
- unparticularized — to make particular.
- unpredictability — not predictable; not to be foreseen or foretold: an unpredictable occurrence.
- unrepresentative — a person or thing that represents another or others.
- upland sandpiper — a large, field-inhabiting sandpiper, Bartramia longicauda, of eastern North America, resembling a plover: now protected and increasing in numbers.
- upper palatinate — See under Palatinate (def 1).
- upsilon particle — the 20th letter of the Greek alphabet (Υ, υ).
- vapor channeling — Vapor channeling exists when vapor flow is distributed in an unequal way in a distillation vessel or stage.
- ventriculography — radiography of the ventricles of the heart after injection of a contrast medium
- virginia creeper — a climbing plant, Parthenocissus quinquefolia, of the grape family, native to North America, having palmate leaves, usually with five leaflets, and bluish-black berries.
- washing-up water — water used for washing dishes
- water chinquapin — an American lotus, Nelumbo lutea, having pale-yellow flowers and an edible seed.
- water-base paint — latex paint.
- weatherstripping — A piece of weatherstrip material.
- white propaganda — propaganda that comes from the source it claims to come from
- windward passage — a strait in the West Indies, between Cuba and Haiti. 50 miles (80 km) wide.
- 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