unblock vs card game

unblock is not a noun while card game is a noun.

Word	Noun	Adjective	Verb	Adverb
unblock	No	No	Yes	No
card game	Yes	No	No	No

unblock (noun)	card game (noun)
	a game played with playing cards

unblock (verb)	card game (verb)
make (assets) available
play the cards of (a suit) so that the last trick on which a hand can follow suit will be taken by a higher card in the hand of a partner who has the remaining cards of a combined holding
clear or remove an obstruction from