unfreeze vs unblock

unfreeze and unblock both are verbs.

Word	Noun	Adjective	Verb	Adverb
unfreeze	No	No	Yes	No
unblock	No	No	Yes	No

As verbs, unfreeze and unblock are synonyms defined as:

Other synonyms of unfreeze include free, release.

unfreeze (verb)	unblock (verb)
become or cause to become soft or liquid	make (assets) available
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