irrupt vs increase

irrupt is not a noun while increase is a noun.

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

As verbs, increase is a hypernym of irrupt; that is, increase is a word with a broader meaning than irrupt:

irrupt (noun)	increase (noun)
	the act of increasing something
	the amount by which something increases
	a change resulting in an increase
	a process of becoming larger or longer or more numerous or more important
	a quantity that is added

irrupt (verb)	increase (verb)
increase rapidly and in an uncontrolled manner	become bigger or greater in amount
erupt or intensify suddenly	make bigger or more
enter uninvited