blow out vs break down

blow out and break down both are verbs.

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

As verbs, break down is a hypernym of blow out; that is, break down is a word with a broader meaning than blow out:

Other hypernyms of blow out include break, conk out, die, fail, give out, give way, go, go bad.

blow out (verb)	break down (verb)
melt, break, or become otherwise unusable	collapse due to fatigue, an illness, or a sudden attack
put out, as of fires, flames, or lights	stop operating or functioning
erupt in an uncontrolled manner	separate (substances) into constituent elements or parts
	make a mathematical, chemical, or grammatical analysis of; break down into components or essential features
	make ineffective
	cause to fall or collapse
	lose control of one's emotions
	fall apart