vapor bath vs washup

vapor bath and washup both are nouns.

Word	Noun	Adjective	Verb	Adverb
vapor bath	Yes	No	No	No
washup	Yes	No	No	No

As nouns, washup is a hypernym of vapor bath; that is, washup is a word with a broader meaning than vapor bath:

vapor bath: you sweat in a steam room before getting a rubdown and cold shower
washup: the act of washing yourself (or another person)

Other hypernyms of vapor bath include bathing.

vapor bath (noun)	washup (noun)
you sweat in a steam room before getting a rubdown and cold shower	the act of washing yourself (or another person)
a room that can be filled with steam in which people bathe; `vapour bath' is a British term	the act of washing dishes