15-letter words containing a, r, o, w, i, n
- parkinson's law — the statement, expressed facetiously as if a law of physics, that work expands to fill the time allotted for its completion.
- port washington — a town on NW Long Island, in SE New York.
- port wine stain — a large birthmark of purplish color, usually on the face or neck.
- port-wine stain — a large birthmark of purplish color, usually on the face or neck.
- powder magazine — a compartment for the storage of ammunition and explosives.
- power macintosh — Power Mac
- primary rainbow — the most commonly seen rainbow, formed by light rays that undergo a single internal reflection in a drop of water.
- prince of wales — Prince of Wales and Duke of Cornwall ("The Black Prince") 1330–76, English military leader (son of Edward III).
- prisoner of war — a person who is captured and held by an enemy during war, especially a member of the armed forces. Abbreviation: POW.
- privately owned — owned by a private individual or organization, rather than by the state or a public body
- railway journey — a journey made by railway train
- railway network — a system of intersecting rail routes
- railway station — train stop, railroad station
- rolling meadows — a city in NE Illinois, near Chicago.
- rowland heights — a city in SW California, near Los Angeles.
- sandwich course — A sandwich course is an educational course in which you have periods of study between periods of being at work.
- satin bowerbird — the largest Australian bowerbird, Ptilonorhynchus violaceus, the male of which has lustrous blue plumage
- senior wrangler — (at Cambridge University) a candidate who has obtained first-class honours in Part II of the mathematics tripos and got the highest marks
- shadow minister — a member of the main opposition party in Parliament who would hold ministerial office if their party were in power
- share ownership — the owning of shares in a company
- spawning ground — a place where fish deposit their eggs for fertilization
- stationary wave — standing wave.
- streamline flow — the flow of a fluid past an object such that the velocity at any fixed point in the fluid is constant or varies in a regular manner.
- thankworthiness — the state or quality of being thankworthy or deserving thanks
- the working man — working class people collectively
- thorndike's law — the principle that all learnt behaviour is regulated by rewards and punishments, proposed by Edward Lee Thorndike (1874–1949), US psychologist
- towers of hanoi — (games) A classic computer science problem, invented by Edouard Lucas in 1883, often used as an example of recursion. "In the great temple at Benares, says he, beneath the dome which marks the centre of the world, rests a brass plate in which are fixed three diamond needles, each a cubit high and as thick as the body of a bee. On one of these needles, at the creation, God placed sixty-four discs of pure gold, the largest disc resting on the brass plate, and the others getting smaller and smaller up to the top one. This is the Tower of Bramah. Day and night unceasingly the priests transfer the discs from one diamond needle to another according to the fixed and immutable laws of Bramah, which require that the priest on duty must not move more than one disc at a time and that he must place this disc on a needle so that there is no smaller disc below it. When the sixty-four discs shall have been thus transferred from the needle on which at the creation God placed them to one of the other needles, tower, temple, and Brahmins alike will crumble into dust, and with a thunderclap the world will vanish." The recursive solution is: Solve for n-1 discs recursively, then move the remaining largest disc to the free needle. Note that there is also a non-recursive solution: On odd-numbered moves, move the smallest sized disk clockwise. On even-numbered moves, make the single other move which is possible.
- transfer window — the period during the year in which a football club can transfer players from other teams into their own
- twist one's arm — to combine, as two or more strands or threads, by winding together; intertwine.
- unseaworthiness — constructed, outfitted, manned, and in all respects fitted for a voyage at sea.
- w.h. richardson — Henry Handel (Henrietta Richardson Robertson) 1870–1946, Australian novelist.
- warrant officer — (in the U.S. Armed Forces) an officer of one of four grades ranking above enlisted personnel and below commissioned officers.
- water pollution — the pollution of the sea and rivers
- weapons carrier — a light truck for transporting weapons or munitions in the field.
- weather station — an installation equipped and used for meteorological observation.
- weatherboarding — an early type of board used as a siding for a building.
- weatherproofing — Present participle of weatherproof.
- weekend warrior — a reservist who attends weekend meetings of his or her unit in order to fulfill military obligations.
- wheelchairbound — Confined to a wheelchair.
- white cast iron — cast iron having most or all of its carbon in the form of cementite and exhibiting a silvery fracture.
- white snakeroot — a North American plant, Eupatorium urticaefolium, the roots or rhizomes of which have been used as a remedy for snakebite
- wilderness road — a 300-mile (500-km) route from eastern Virginia through the Cumberland Gap into Kentucky, explored by Daniel Boone in 1769 and marked as a trail by him and other pioneers in 1775: a major route for early settlers moving west.
- windfall profit — a profit that arises thanks to an external event over which the person profiting had no control
- winter holidays — a period of rest from work or studies taken in winter
- with one accord — If a number of people do something with one accord, they do it together or at the same time, because they agree about what should be done.
- wolverine state — Michigan (used as a nickname).
- worcester china — porcelain articles made in Worcester (England) from 1751 in a factory that became, in 1862, the Royal Worcester Porcelain Company
- working capital — the amount of capital needed to carry on a business.
- working drawing — an accurately measured and detailed drawing of a structure, machine, etc., or of any part of one, used as a guide to workers in constructing it.
- working holiday — trip combining vacation with job experience