saleroom vs salesroom

saleroom and salesroom both are nouns.

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

As nouns, saleroom and salesroom are synonyms defined as:

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

Other synonyms of saleroom include showroom.

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