arise vs hap

arise is not a noun while hap is a noun.

Word	Noun	Adjective	Verb	Adverb
arise	No	No	Yes	No
hap	Yes	No	Yes	No

As verbs, hap is a hypernym of arise; that is, hap is a word with a broader meaning than arise:

Other hypernyms of arise include come about, fall out, go on, happen, occur, pass, pass off, take place.

arise (noun)	hap (noun)
	an accidental happening

arise (verb)	hap (verb)
get up and out of bed	come to pass
result or issue
rise to one's feet
move upward
take part in a rebellion; renounce a former allegiance
come into existence; take on form or shape
originate or come into being