21-letter words containing s, w, i, l, a
- watenstedt-salzgitter — former name of Salzgitter.
- weinberg-salam theory — electroweak theory.
- west lothian question — the apparent inconsistency that members of parliament who represent Scottish constituencies are eligible to vote at Westminster on matters that relate only to England, whereas members of parliament from English constituencies are not eligible to vote on Scottish matters
- west university place — a city in SE Texas.
- whistling in the dark — If you say that someone is whistling in the dark, you mean that they are trying to remain brave and convince themselves that the situation is not as bad as it seems.
- wholesale price index — an indicator of price changes in the wholesale market
- william of malmesbury — William of, William of Malmesbury.
- yellow lady's-slipper — a showy orchid, Cypripedium calceolus, of eastern North America, having purple-tinged yellow flowers with an inflated lip petal.