irrupt vs bother

irrupt is not a noun while bother is a noun.

Word	Noun	Adjective	Verb	Adverb
irrupt	No	No	Yes	No
bother	Yes	No	Yes	No

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

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

irrupt (noun)	bother (noun)
	something or someone that causes trouble; a source of unhappiness
	an angry disturbance

irrupt (verb)	bother (verb)
increase rapidly and in an uncontrolled manner	cause annoyance in; disturb, especially by minor irritations
erupt or intensify suddenly	make confused or perplexed or puzzled
enter uninvited	make nervous or agitated
	intrude or enter uninvited
	take the trouble to do something; concern oneself
	to cause inconvenience or discomfort to