break open vs blow

break open is not a noun while blow is a noun.

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

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

Other hyponyms of break open include pop, stave, stave in.

break open (noun)	blow (noun)
	a powerful stroke with the fist or a weapon
	forceful exhalation through the nose or mouth
	street names for cocaine
	an impact (as from a collision)
	an unpleasant or disappointing surprise
	an unfortunate happening that hinders or impedes; something that is thwarting or frustrating
	a strong current of air

break open (verb)	blow (verb)
erupt or intensify suddenly	exhale hard
come open suddenly and violently, as if from internal pressure	free of obstruction by blowing air through
open with force	melt, break, or become otherwise unusable
	burst suddenly
	shape by blowing
	show off
	cause to be revealed and jeopardized
	allow to regain its breath
	deposit eggs (of insects)
	be in motion due to some air or water current
	cause to move by means of an air current
	leave; informal or rude
	cause air to go in, on, or through
	spout moist air from the blowhole
	play or sound a wind instrument
	make a sound as if blown
	sound by having air expelled through a tube
	provide sexual gratification through oral stimulation
	spend lavishly or wastefully on
	spend thoughtlessly; throw away
	make a mess of, destroy or ruin
	be inadequate or objectionable
	be blowing or storming