black market vs market

black market and market both are nouns.

Word	Noun	Adjective	Verb	Adverb
black market	Yes	No	Yes	No
market	Yes	No	Yes	No

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

black market: an illegal market in which goods or currencies are bought and sold in violation of rationing or controls
market: the world of commercial activity where goods and services are bought and sold

Other hypernyms of black market include market place, marketplace.

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

black market (noun)	market (noun)
an illegal market in which goods or currencies are bought and sold in violation of rationing or controls	the world of commercial activity where goods and services are bought and sold
people who engage in illicit trade	a marketplace where groceries are sold
	an area in a town where a public mercantile establishment is set up
	the customers for a particular product or service
	the securities markets in the aggregate

black market (verb)	market (verb)
deal in illegally, such as arms or liquor	make commercial
	engage in the commercial promotion, sale, or distribution of
	deal in a market
	buy household supplies