break down vs blow

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

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

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

Other hyponyms of break down include crash, go down, blow out, burn out, misfire, malfunction, misfunction.

break down (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 down (verb)	blow (verb)
collapse due to fatigue, an illness, or a sudden attack	exhale hard
stop operating or functioning	free of obstruction by blowing air through
separate (substances) into constituent elements or parts	melt, break, or become otherwise unusable
make a mathematical, chemical, or grammatical analysis of; break down into components or essential features	burst suddenly
make ineffective	shape by blowing
cause to fall or collapse	show off
lose control of one's emotions	cause to be revealed and jeopardized
fall apart	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