go over vs come about

go over and come about both are verbs.

Word	Noun	Adjective	Verb	Adverb
go over	No	No	Yes	No
come about	No	No	Yes	No

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

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

go over (verb)	come about (verb)
fall forward and down	come to pass
happen in a particular manner
hold a review (of troops)
examine so as to determine accuracy, quality, or condition