16-letter words containing w, n, p, l
- windowpane shell — capiz.
- windshield wiper — an electrically or pneumatically operated device consisting of a squeegee connected to a mechanical arm designed to wipe off rain, snow, etc., from a windshield or rear window.
- wolfenden report — a study produced in 1957 by the Committee on Homosexual Offences and Prostitution in Britain, which recommended that homosexual relations between consenting adults be legalized
- world bank group — the collective name for the International Bank for Reconstruction and Development, the International Finance Corporation, and the International Development Association, whose headquarters are all in Washington
- world exposition — world's fair.
- yellow pimpernel — Lysimachia nemorum
- yellow poinciana — royal poinciana.