mercantile establishment vs sales outlet

mercantile establishment and sales outlet both are nouns.

Word	Noun	Adjective	Verb	Adverb
mercantile establishment	Yes	No	No	No
sales outlet	Yes	No	No	No

As nouns, mercantile establishment and sales outlet are synonyms defined as:

mercantile establishment and sales outlet: a place of business for retailing goods

Other synonyms of mercantile establishment include outlet, retail store.

mercantile establishment (noun)	sales outlet (noun)
a place of business for retailing goods	a place of business for retailing goods