intervene vs step in

intervene and step in both are verbs.

Word	Noun	Adjective	Verb	Adverb
intervene	No	No	Yes	No
step in	No	No	Yes	No

As verbs, intervene and step in are synonyms defined as:

intervene and step in: get involved, so as to alter or hinder an action, or through force or threat of force

Other synonyms of intervene include interfere, interpose.

intervene (verb)	step in (verb)
occur between other event or between certain points of time	get involved, so as to alter or hinder an action, or through force or threat of force
get involved, so as to alter or hinder an action, or through force or threat of force	act as a substitute
be placed or located between other things or extend between spaces and events