shower bath vs shower stall

shower bath and shower stall both are nouns.

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

As nouns, shower bath and shower stall are synonyms defined as:

shower bath and shower stall: booth for washing yourself, usually in a bathroom

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