18-letter words containing o, s, t, w, a
- westinghouse brake — a railroad air brake operated by compressed air.
- what has become of — If you wonder what has become of someone or something, you wonder where they are and what has happened to them.
- white-spotted hyla — a type of tree frog (H. leucophyllata) of tropical America
- withdrawal symptom — effects of stopping a drug
- without hesitation — immediately, willingly
- woman of the house — lady of the house.
- women at point sur — a narrative poem (1927) by Robinson Jeffers.
- women's liberation — a movement to combat sexual discrimination and to gain full legal, economic, vocational, educational, and social rights and opportunities for women, equal to those of men.
- work-study program — a program enabling high-school or college students to combine academic work with actual job experience.
- wrangell mountains — a mountain range in SE Alaska, extending into the Yukon, Canada. Highest peak: Mount Blackburn, 5037 m (16 523 ft)
- writ of assistance — a writ issued by a superior colonial court authorizing officers of the British crown to summon aid and enter and search any premises.