vapor bath vs steam room

vapor bath and steam room both are nouns.

Word	Noun	Adjective	Verb	Adverb
vapor bath	Yes	No	No	No
steam room	Yes	No	No	No

As nouns, vapor bath and steam room are synonyms defined as:

vapor bath and steam room: a room that can be filled with steam in which people bathe; `vapour bath' is a British term

Other synonyms of vapor bath include steam bath, vapour bath.

vapor bath (noun)	steam room (noun)
you sweat in a steam room before getting a rubdown and cold shower	a room that can be filled with steam in which people bathe; `vapour bath' is a British term
a room that can be filled with steam in which people bathe; `vapour bath' is a British term