open up vs unlock

open up and unlock both are verbs.

Word	Noun	Adjective	Verb	Adverb
open up	No	No	Yes	No
unlock	No	No	Yes	No

As verbs, unlock is a hyponym of open up; that is, unlock is a word with a more specific, narrower meaning than open up:

Other hyponyms of open up include unbar, break open, click open, reopen, unbolt, unseal, uncork, jimmy, lever, prise, prize, pry, breach, gap, lance.

open up (verb)	unlock (verb)
make available	become unlocked
become available	open the lock of
talk freely and without inhibition	set free or release
cause to open or to become open
become open
open up an area or prepare a way
start to operate or function or cause to start operating or functioning