15-letter words containing h, o, i, s
- white corpuscle — white blood cell.
- white mountains — a mountain range in the US, chiefly in N New Hampshire: part of the Appalachians. Highest peak: Mount Washington, 1917 m (6288 ft)
- white snakeroot — a North American plant, Eupatorium urticaefolium, the roots or rhizomes of which have been used as a remedy for snakebite
- whoopee cushion — a type of cushion or pillow used as a practical joke that, when sat upon, produces a loud noise resembling flatulence.
- wilson's thrush — veery.
- window shopping — browsing store displays
- winesburg, ohio — a cycle of short stories (1919) by Sherwood Anderson.
- winter holidays — a period of rest from work or studies taken in winter
- witch of agnesi — a plane curve symmetrical about the y- axis and asymptotic to the x- axis, given by the equation x 2 y =4 a 2 (2 a − y).
- with respect to — as regards
- without reserve — without reservations; fully; wholeheartedly
- worcester china — porcelain articles made in Worcester (England) from 1751 in a factory that became, in 1862, the Royal Worcester Porcelain Company
- yellow goatfish — a schooling goatfish, Mulloidichthys martinicus, inhabiting the Atlantic Ocean from Florida to Panama.
- yin-yang school — a school of ancient Chinese philosophers who interpreted history in terms of the influence of the seasons and of five elements: earth, wood, metal, fire, and water.
- yorkshire chair — Derbyshire chair.
- yorkshire dales — the valleys of the rivers flowing from the Pennines in W Yorkshire: chiefly Ribblesdale, Swaledale, Nidderdale, Wharfedale, and Wensleydale; tourist area
- zoophysiologist — an expert in zoophysiology