irrupt vs move in on

irrupt and move in on both are verbs.

Word	Noun	Adjective	Verb	Adverb
irrupt	No	No	Yes	No
move in on	No	No	Yes	No

As verbs, move in on is a hyponym of irrupt; that is, move in on is a word with a more specific, narrower meaning than irrupt:

Other hyponyms of irrupt include break in, bother, barge in, crash, gate-crash.

irrupt (verb)	move in on (verb)
increase rapidly and in an uncontrolled manner	make intrusive advances towards
erupt or intensify suddenly	intervene, so as to seize control of
enter uninvited