step in vs interfere

step in and interfere both are verbs.

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

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

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

Other synonyms of step in include interpose, intervene.

step in (verb)	interfere (verb)
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	come between so as to be hindrance or obstacle