21-letter words containing n, a, y, s, i
- voice-stress analyzer — a machine purported to detect stress in a human voice and to ascertain a person's truthfulness.
- voluntary association — a group of individuals joined together on the basis of mutual interest or common objectives, especially a business group that is not organized or constituted as a legal entity.
- washington's birthday — February 22, formerly observed as a legal holiday in most states of the U.S. in honor of the birth of George Washington.
- weinberg-salam theory — electroweak theory.
- west university place — a city in SE Texas.
- youth training scheme — (formerly, in Britain) a scheme, run by the Training Agency, to provide vocational training for unemployed 16–17-year-olds