marketplace vs grocery

marketplace and grocery both are nouns.

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

As nouns, grocery is a hyponym of marketplace; that is, grocery is a word with a more specific, narrower meaning than marketplace:

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

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