17-letter words containing t, w, i, s, o
- wheatstone bridge — a circuit for measuring an unknown resistance by comparing it with known resistances.
- whistler's mother — (formal name, Arrangement in Gray and Black No. 1: Portrait of the Artist's Mother) a painting (1871) by James McNeill Whistler.
- white blood cells — any of various nearly colorless cells of the immune system that circulate mainly in the blood and lymph and participate in reactions to invading microorganisms or foreign particles, comprising the B cells, T cells, macrophages, monocytes, and granulocytes.
- white-nationalism — white supremacy.
- wild sweet potato — man-of-the-earth.
- wings of the dove — a novel (1902) by Henry James.
- wireless operator — a radio operator
- women's institute — (in Britain and Commonwealth countries) a society for women interested in the problems of the home and in engaging in social activities
- wood preservative — a coating applied to timber as a protection against decay, insects, weather, etc
- working substance — a substance, usually a fluid, that undergoes changes in pressure, temperature, volume, or form as part of a process for accomplishing work.
- worth one's while — a period or interval of time: to wait a long while; He arrived a short while ago.
- yellowstone river — river flowing from NW Wyo. through Mont. into the Missouri River: 671 mi (1,080 km)
- zebra swallowtail — a swallowtail butterfly, Papilio marcellus, having black and greenish-white stripes on the wings.