15-letter words containing m, o, s, t, a
- vermouth cassis — a mixed drink made with dry vermouth, crème de cassis, soda or mineral water, and cracked ice.
- washington palm — a palm tree, Washingtonia filifera, of California and Florida, having large fan-shaped leaves and small black fruits
- well-accustomed — customary; usual; habitual: in their accustomed manner.
- 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)
- x-ray astronomy — the branch of astronomy that studies celestial objects by means of the x-rays emitted by them.
- yosemite valley — a glacial valley in Yosemite National Park in central California, in the Sierra Nevada Mountains. It has an altitude of about 1200 m (4000 ft), with sheer walls rising about another 1200 m (4000 ft).