card game vs unblock

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

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

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

card game (verb)	unblock (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