18-letter words containing w, r, s, t, a
- operating software — software used in the operation of a computer system, typically by performing such tasks as memory allocation, job scheduling, and input/output control
- oriental scops owl — any of a group of small owls having ear tufts and a whistling call, especially Otus scops (Old World scops owl) and O. sunia (Oriental scops owl)
- owen stanley range — a mountain range in SE New Guinea. Highest peak: Mount Victoria, 4073 m (13 363 ft)
- peter tschaikowsky — Peter Ilyich [il-yich] /ˈɪl yɪtʃ/ (Show IPA), Tchaikovsky, Peter Ilyich.
- presumption of law — a presumption based upon a policy of law or a general rule and not upon the facts or evidence in an individual case.
- resistance welding — welding utilizing pressure and heat that is generated in the pieces to be welded by resistance to an electric current.
- revolutionary wars — American Revolution.
- rhode island white — one of a dual-purpose American breed of chickens having white feathers and a rose comb.
- right-to-work laws — a state law making it illegal to refuse employment to a person for the sole reason that he or she is not a union member.
- row address strobe — (storage) (RAS) An input to a dynamic random-access memory (DRAM) to indicate that the row address lines are valid.
- salem witch trials — 17th-century witchcraft case
- saskatchewan party — (in Canada) a Saskatchewan political party formed by former members of the provincial Progressive Conservative and Liberal Parties
- schwarz inequality — Also called Cauchy's inequality. the theorem that the inner product of two vectors is less than or equal to the product of the magnitudes of the vectors.
- self-tapping screw — a screw designed to tap its corresponding female thread as it is driven.
- short-tailed shrew — a grayish-black shrew, Blarina brevicauda, common in eastern North America, that has a tail less than half the length of the body.
- skinny-rib sweater — a tight-fitting ribbed woollen jumper or pullover
- slow-motion replay — a showing again in slow motion of a sequence of action, esp of part of a sporting contest immediately after it happens
- software backplane — (programming, tool) A CASE framework from Atherton.
- solomon rabinowitz — Solomon, Aleichem, Sholom.
- sow dragon's teeth — to take some action that is intended to prevent strife or trouble but that actually brings it about
- spike-tooth harrow — a harrow equipped with straight teeth on horizontal bars, usually employed to smooth and level plowed soil or seedbeds for planting or sowing.
- st. andrew's cross — a low evergreen shrub, Ascyrum hypericoides, native to temperate and subtropical America, having flowers in clusters of three: often cultivated.
- st. lawrence river — a river in SE Canada, flowing NE from Lake Ontario, forming part of the boundary between New York and Ontario, and emptying into the Gulf of St. Lawrence. 760 miles (1225 km) long.
- stomach sweetbread — sweetbread (def 1).
- swarm intelligence — the collective behaviour of a group of animals, esp social insects such as ants, bees, and termites, that are each following very basic rules
- swartkrans ape-man — the fossil remains of the extinct hominid Australopithecus robustus, found at Swartkrans, Republic of South Africa: formerly classified in the genus Paranthropus.
- sweet vernal grass — a Eurasian meadow grass, Anthoxanthum odoratum, found throughout North America, having clusters of brownish-green flowers.
- sweptwing aircraft — an aircraft which has wings that are swept (usually) backwards
- take the wraps off — to reveal
- territorial waters — law: nation's boundaries
- the bird has flown — the person in question has fled or escaped
- the cat's whiskers — a person or thing that is excellent or superior
- the powers that be — You can refer to people in authority as the powers that be, especially when you want to say that you disagree with them or do not understand what they say or do.
- the worse for wear — If you say that someone is the worse for wear, you mean that they are tired, ill, or in a bad state because they have been very active, been through a difficult experience, or been drinking alcohol.
- to bear witness to — If a person or thing bears witness to something, they show or say that it exists or happened.
- to sweep the board — If someone sweeps the board in a competition or election, they win nearly everything that it is possible to win.
- to watch your step — If someone tells you to watch your step, they are warning you to be careful about how you behave or what you say so that you do not get into trouble.
- treaty of rijswijk — a treaty signed at Rijswijk in the Netherlands in 1697, ending the War of the Grand Alliance
- two-chamber system — the system of having two parliamentary chambers, as the House of Lords and the House of Commons in the United Kingdom
- ultrasonic welding — the use of high-energy vibration of ultrasonic frequency to produce a weld between two components which are held in close contact
- wandering minstrel — travelling performer
- wardrobe assistant — a person who assists the wardrobe mistress in a theatre
- warehouse capacity — the amount of storage space in a warehouse
- warrant of fitness — a six-monthly certificate required for motor vehicles certifying mechanical soundness
- water stick insect — a slender sticklike flightless water bug, Ranatra linearis, that is predatory on small creatures such as water fleas
- watson-crick model — a widely accepted model for the three-dimensional structure of DNA, featuring a double-helix configuration for the molecule's two hydrogen-bonded complementary polynucleotide strands.
- weather forecaster — meteorologist
- weberian apparatus — (in certain fishes) a chain of small bones and ligaments connecting the inner ear with the air bladder.
- west-northwestward — moving, bearing, facing, or situated toward the west-northwest.
- west-southwestward — moving, bearing, facing, or situated toward the west-southwest.