18-letter words containing a, b, i, d, e, t
- united arab states — a former (1958–61) federation of the United Arab Republic (Egypt and Syria) and Yemen.
- urban homesteading — homesteading (def 2).
- wardrobe assistant — a person who assists the wardrobe mistress in a theatre
- white man's burden — the alleged duty of white colonizers to care for nonwhite indigenous subjects in their colonial possessions.
- widemouth blindcat — any of several catfishes, as Satan eurystomus (widemouth blindcat) of Texas, that inhabit underground streams and have undeveloped eyes and unpigmented skin.