black market vs ply

black market and ply both are nouns.

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

black market (noun)	ply (noun)
an illegal market in which goods or currencies are bought and sold in violation of rationing or controls	(usually in combinations) one of several layers of cloth or paper or wood as in plywood
people who engage in illicit trade	one of the strands twisted together to make yarn or rope or thread; often used in combination

black market (verb)	ply (verb)
deal in illegally, such as arms or liquor	give what is desired or needed, especially support, food or sustenance
	use diligently
	wield vigorously
	join together as by twisting, weaving, or molding
	travel a route regularly
	apply oneself diligently