18-letter words containing n, u, m, b, a, t
- the black mountain — a mountain range in S Wales, in E Carmarthenshire and W Powys. Highest peak: Carmarthen Van, 802 m (2632 ft)
- thermonuclear bomb — hydrogen bomb.
- transfinite number — an infinite cardinal or ordinal number.
- urban contemporary — popular dance music incorporating elements of rap, rhythm-and-blues, funk, and soul.
- urban homesteading — homesteading (def 2).
- 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.