come around vs happen

come around and happen both are verbs.

Word	Noun	Adjective	Verb	Adverb
come around	No	No	Yes	No
happen	No	No	Yes	No

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

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

come around (verb)	happen (verb)
happen regularly	come to pass
change one's position or opinion	come into being; become reality
	happen, occur, or be the case in the course of events or by chance
	come upon, as if by accident; meet with
	chance to be or do something, without intention or causation