go over vs happen

go over and happen both are verbs.

Word	Noun	Adjective	Verb	Adverb
go over	No	No	Yes	No
happen	No	No	Yes	No

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

Other hypernyms of go over include come about, fall out, go on, hap, occur, pass, pass off, take place.

go over (verb)	happen (verb)
fall forward and down	come to pass
happen in a particular manner	come into being; become reality
hold a review (of troops)	happen, occur, or be the case in the course of events or by chance
examine so as to determine accuracy, quality, or condition	come upon, as if by accident; meet with
	chance to be or do something, without intention or causation