come back vs recur

come back and recur both are verbs.

Word	Noun	Adjective	Verb	Adverb
come back	No	No	Yes	No
recur	No	No	Yes	No

As verbs, recur is a hyponym of come back; that is, recur is a word with a more specific, narrower meaning than come back:

Other hyponyms of come back include go back.

come back (verb)	recur (verb)
be restored	happen or occur again
go back to something earlier	return in thought or speech to something
answer back	have recourse to
even the score, in sports