contraband vs black-market

contraband is a noun but black-market is not a noun.

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

As adjectives, contraband and black-market are synonyms defined as:

Other synonyms of contraband include black, bootleg, smuggled.

contraband (noun)	black-market (noun)
goods whose importation or exportation or possession is prohibited by law

contraband (adjective)	black-market (adjective)
distributed or sold illicitly	distributed or sold illicitly