intervene vs occur

intervene and occur both are verbs.

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

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

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

intervene (verb)	occur (verb)
occur between other event or between certain points of time	come to pass
get involved, so as to alter or hinder an action, or through force or threat of force	come to one's mind; suggest itself
be placed or located between other things or extend between spaces and events	to be found to exist