13-letter words containing s, n, a, p, o
- waterscorpion — any of several predaceous aquatic bugs of the family Nepidae, having clasping front legs and a long respiratory tube at the rear of the abdomen: capable of biting if handled.
- weapon system — a weapon and the components necessary to its proper function, such as targeting and guidance devices
- weapons-grade — Weapons-grade substances such as uranium or plutonium are of a quality which makes them suitable for use in the manufacture of nuclear weapons.
- weatherperson — a meteorologist or weathercaster.
- west paterson — a town in NE New Jersey.
- xiphiplastron — the fourth lateral plate of a turtle's plastron
- zinjanthropus — the genus to which Australopithecus boisei was formerly assigned.
- zoosporangium — a sporangium or spore case in which zoospores are produced.
- zygosporangia — a sporangium that bears a zygospore.