15-letter words containing t, i, o, u
- 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)
- whitley council — any of a number of organizations made up of representatives of employees and employers for joint consultation on and settlement of industrial relations and conditions for a particular industry or service
- wilson's thrush — veery.
- winter flounder — any of various popular food flatfishes, as Parophrys vetulus of the Pacific (English sole) and Pseudopleuronectes americanus of the Atlantic (winter flounder or blackback flounder)
- without a hitch — smoothly, easily, and successfully
- without reserve — without reservations; fully; wholeheartedly
- women's studies — a program of studies concentrating on the role of women in history, learning, and culture.
- wood turpentine — turpentine obtained from pine trees.
- writ of summons — a writ requiring one to appear in court to answer a complaint.
- yes-no question — a question calling for an answer of yes or no, as Are you ready?
- yes/no question — a question inviting the answer "yes" or "no"
- you can keep it — I have no interest in what you are offering
- ytterbium oxide — a colorless compound, Yb 2 O 3 , used in certain alloys and ceramics.