hap vs go on

hap is a noun but go on is not a noun.

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

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

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

hap (noun)	go on (noun)
an accidental happening

hap (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