occur vs go on

occur and go on both are verbs.

Word	Noun	Adjective	Verb	Adverb
occur	No	No	Yes	No
go on	No	No	Yes	No

As verbs, occur and go on are synonyms defined as:

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

occur (verb)	go on (verb)
come to pass	come to pass
come to one's mind; suggest itself	continue talking
to be found to exist	start running, functioning, or operating
	move forward, also in the metaphorical sense
	continue a certain state, condition, or activity