vapour bath vs steam room

vapour bath and steam room both are nouns.

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

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

vapour 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 vapour bath include steam bath, vapor bath.

vapour 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