marketplace vs retail store

marketplace and retail store both are nouns.

Word	Noun	Adjective	Verb	Adverb
marketplace	Yes	No	No	No
retail store	Yes	No	No	No

As nouns, retail store is a hypernym of marketplace; that is, retail store is a word with a broader meaning than marketplace:

marketplace: an area in a town where a public mercantile establishment is set up
retail store: a place of business for retailing goods

Other hypernyms of marketplace include mercantile establishment, outlet, sales outlet.

marketplace (noun)	retail store (noun)
the world of commercial activity where goods and services are bought and sold	a place of business for retailing goods
an area in a town where a public mercantile establishment is set up