come back vs go back

come back and go back both are verbs.

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

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

Other hyponyms of come back include recur.

come back (verb)	go back (verb)
be restored	regain a former condition after a financial loss
go back to something earlier	return in thought or speech to something
answer back	belong to an earlier time
even the score, in sports