intervene vs fall out

intervene and fall out both are verbs.

Word	Noun	Adjective	Verb	Adverb
intervene	No	No	Yes	No
fall out	No	No	Yes	No

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

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

intervene (verb)	fall out (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	have a breach in relations
be placed or located between other things or extend between spaces and events	drop out
	leave (a barracks) in order to take a place in a military formation, or leave a military formation
	come as a logical consequence; follow logically