showroom vs salesroom

showroom and salesroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
showroom	Yes	No	No	No
salesroom	Yes	No	No	No

As nouns, showroom and salesroom are synonyms defined as:

showroom and salesroom: an area where merchandise (such as cars) can be displayed

Other synonyms of showroom include saleroom.

showroom (noun)	salesroom (noun)
an area where merchandise (such as cars) can be displayed	an area where merchandise (such as cars) can be displayed