supervene vs happen

supervene and happen both are verbs.

Word	Noun	Adjective	Verb	Adverb
supervene	No	No	Yes	No
happen	No	No	Yes	No

As verbs, happen is a hypernym of supervene; that is, happen is a word with a broader meaning than supervene:

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

supervene (verb)	happen (verb)
take place as an additional or unexpected development	come to pass
	come into being; become reality
	happen, occur, or be the case in the course of events or by chance
	come upon, as if by accident; meet with
	chance to be or do something, without intention or causation