mercantile establishment vs retail store

mercantile establishment and retail store both are nouns.

Word	Noun	Adjective	Verb	Adverb
mercantile establishment	Yes	No	No	No
retail store	Yes	No	No	No

As nouns, mercantile establishment and retail store are synonyms defined as:

mercantile establishment and retail store: a place of business for retailing goods

Other synonyms of mercantile establishment include outlet, sales outlet.

mercantile establishment (noun)	retail store (noun)
a place of business for retailing goods	a place of business for retailing goods