break open vs open up

break open and open up both are verbs.

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

As verbs, open up is a hypernym of break open; that is, open up is a word with a broader meaning than break open:

Other hypernyms of break open include open.

break open (verb)	open up (verb)
erupt or intensify suddenly	make available
come open suddenly and violently, as if from internal pressure	become available
open with force	talk freely and without inhibition
	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