grocery store vs marketplace

grocery store and marketplace both are nouns.

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

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

grocery store: a marketplace where groceries are sold
marketplace: an area in a town where a public mercantile establishment is set up

Other hypernyms of grocery store include market, market place, mart.

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