come around vs fall out

come around and fall out both are verbs.

Word	Noun	Adjective	Verb	Adverb
come around	No	No	Yes	No
fall out	No	No	Yes	No

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

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

come around (verb)	fall out (verb)
happen regularly	come to pass
change one's position or opinion	have a breach in relations
	drop out
	leave (a barracks) in order to take a place in a military formation, or leave a military formation
	come as a logical consequence; follow logically