4-letter words containing a, s
- nast — Thomas, 1840–1902, U.S. illustrator and cartoonist.
- nats — Nationalists, esp. Scottish Nationalists
- nays — and not only so but; not only that but also; indeed: many good, nay, noble qualities.
- ncsa — National Center for Supercomputing Applications
- nias — (obsolete) A young hawk; an eyas.
- nysa — the mountain where Zeus sent the infant Dionysus to protect him from the vindictive wrath of Hera.
- oafs — Plural form of oaf.
- oaks — any tree or shrub belonging to the genus Quercus, of the beech family, bearing the acorn as fruit.
- oars — a long shaft with a broad blade at one end, used as a lever for rowing or otherwise propelling or steering a boat.
- oast — a kiln for drying hops or malt.
- oats — a cereal grass, Avena sativa, cultivated for its edible seed.
- obas — Plural form of oba.
- ocas — a wood sorrel, Oxalis tuberosa, of the Andes, cultivated in South America for its edible tubers.
- odas — a room within a harem.
- odsa — Open Distributed System Architecture
- osar — plural of os3 .
- osax — OSA extension
- osha — the division of the Department of Labor that sets and enforces occupational health and safety rules.
- ossa — a mountain in E Greece, in Thessaly. 6490 feet (1978 meters).
- osta — Optical Storage Technology Association
- pa's — father.
- pais — outside of court; without legal proceedings.
- pans — an international distress signal used by shore stations to inform a ship, aircraft, etc., of something vital to its safety or to the safety of one of its passengers.
- paps — a teat; nipple.
- pars — Programmable Airline Reservation System
- pasc — Perceptional Adaptive Subband Coding
- pase — (in bullfighting) a maneuver by a bullfighter with the capa or muleta to gain the attention of the bull and to guide the course of its attack.
- pash — an infatuation for another person; crush.
- pass — to move past; go by: to pass another car on the road.
- past — gone by or elapsed in time: It was a bad time, but it's all past now.
- paws — father; pa.
- pdsa — People's Dispensary for Sick Animals
- peas — the round, edible seed of a widely cultivated plant, Pisum sativum, of the legume family.
- pisa — a city in NW Italy, on the Arno River: leaning tower.
- psat — Preliminary Scholastic Aptitude Test: a multiple-choice test done at high school as a practice for college entrance tests
- psia — pounds per square inch, absolute
- qats — an evergreen shrub, Catha edulis, of Arabia and Africa, the leaves of which are used as a narcotic when chewed or made into a beverage.
- qsam — Physical Sequential
- quas — Alternative spelling of kvass.
- rags — a musical composition in ragtime: a piano rag.
- rais — Redundant Array of Inexpensive Servers
- rans — a sea goddess who drags down ships and drowns sailors: the wife of Aegir.
- rasa — (in Hindu aesthetics) flavor, sentiment, or emotion: regarded as one of the fundamental qualities of classical music, dance, and poetry.
- rasc — (the former) Royal Army Service Corps, now called Royal Corps of Transport
- rase — to tear down; demolish; level to the ground: to raze a row of old buildings.
- rash — acting or tending to act too hastily or without due consideration.
- rask — Rasmus Christian [ras-muh s kris-chuh n;; Danish rahs-moo s krees-tyahn] /ˈræs məs ˈkrɪs tʃən;; Danish ˈrɑs mʊs ˈkris tyɑn/ (Show IPA), 1787–1832, Danish philologist.
- rasp — to scrape or abrade with a rough instrument.
- rats — any of several long-tailed rodents of the family Muridae, of the genus Rattus and related genera, distinguished from the mouse by being larger.
- rays — John, 1627?–1705, English naturalist.