16-letter words containing t, a, s, i
- white wood aster — a composite plant, Aster divaricatus, of North America, having flat-topped clusters of white ray flowers and growing in dry woods.
- windfall profits — Windfall profits are excessive profits with a non-business cause such as a natural disaster.
- wire-transferred — to transmit (money or credit) by wire transfer.
- witches' sabbath — Sabbat.
- with clean hands — innocently
- woody nightshade — bittersweet (def 3).
- word association — stimulation of an associative pattern by a word.
- world federalist — a promoter or supporter of world federalism.
- writ of subpoena — a legal document commanding the attendance in court, as a witness, of the person on whom it is served, under a penalty
- yah-boo politics — adversarial politics in which politicians constantly deride their opponents and dismiss everything suggested by them
- zagros mountains — a mountain range in S Iran: has Iran's main oilfields in its W central foothills. Highest peak: Zard Kuh, 4548 m (14 920 ft)
- ziegler catalyst — any of a group of catalysts, such as titanium trichloride (TiCl3) and aluminium alkyl (Al(CH3)3), that produce stereospecific polymers