come about vs go on

come about and go on both are verbs.

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

As verbs, come about and go on are synonyms defined as:

Other synonyms of come about include fall out, hap, happen, occur, pass, pass off, take place.

come about (verb)	go on (verb)
come to pass	come to pass
	continue talking
	start running, functioning, or operating
	move forward, also in the metaphorical sense
	continue a certain state, condition, or activity