18-letter words containing m, i, s, h, n
- thermoluminescence — phosphorescence produced by the heating of a substance.
- thomas alva edison — Thomas Alva [al-vuh] /ˈæl və/ (Show IPA), 1847–1931, U.S. inventor, especially of electrical devices.
- to come unstitched — to go wrong or awry
- transmission shaft — a shaft that rotates transmitting motion from the engine to the differential gear
- urban homesteading — homesteading (def 2).
- vermilion rockfish — a scarlet-red rockfish, Sebastes miniatus, inhabiting waters along the Pacific coast of North America, important as a food fish.
- wesleyan methodist — a member of any of the churches founded on the evangelical principles of John Wesley.
- western hemisphere — the western part of the terrestrial globe, including North and South America, their islands, and the surrounding waters.
- white man's burden — the alleged duty of white colonizers to care for nonwhite indigenous subjects in their colonial possessions.
- world championship — an international competition in a particular sport or activity for people all around the world