15-letter words containing i, n, t, r, a, o
- victoria nyanza — Victoria (def 10).
- viral infection — disease caused by a virus
- virginian stock — a similar and related North American plant, Malcolmia maritima
- vulgar fraction — common fraction.
- 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
- 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.
- 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
- 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 storage — the amount of memory used to temporarily store results or other data while a program is running.