shower bath vs shower room

shower bath and shower room both are nouns.

Word	Noun	Adjective	Verb	Adverb
shower bath	Yes	No	No	No
shower room	Yes	No	No	No

shower bath (noun)	shower room (noun)
washing yourself by standing upright under water sprayed from a nozzle	a room with several showers
booth for washing yourself, usually in a bathroom