go over vs break down

go over and break down both are verbs.

Word	Noun	Adjective	Verb	Adverb
go over	No	No	Yes	No
break down	No	No	Yes	No

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

Other hypernyms of go over include collapse.

go over (verb)	break down (verb)
fall forward and down	collapse due to fatigue, an illness, or a sudden attack
happen in a particular manner	stop operating or functioning
hold a review (of troops)	separate (substances) into constituent elements or parts
examine so as to determine accuracy, quality, or condition	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