slave market vs market place

slave market and market place both are nouns.

Word	Noun	Adjective	Verb	Adverb
slave market	Yes	No	No	No
market place	Yes	No	No	No

As nouns, market place is a hypernym of slave market; that is, market place is a word with a broader meaning than slave market:

slave market: a marketplace where slaves were auctioned off (especially in the southern United States before the American Civil War)
market place: an area in a town where a public mercantile establishment is set up

Other hypernyms of slave market include market, marketplace, mart.

slave market (noun)	market place (noun)
a marketplace where slaves were auctioned off (especially in the southern United States before the American Civil War)	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