recur vs occur

recur and occur both are verbs.

Word	Noun	Adjective	Verb	Adverb
recur	No	No	Yes	No
occur	No	No	Yes	No

As verbs, occur is a hypernym of recur; that is, occur is a word with a broader meaning than recur:

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

recur (verb)	occur (verb)
happen or occur again	come to pass
return in thought or speech to something	come to one's mind; suggest itself
have recourse to	to be found to exist