pullulate vs increase

pullulate is not a noun while increase is a noun.

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

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

pullulate (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

pullulate (verb)	increase (verb)
breed freely and abundantly	become bigger or greater in amount
produce buds, branches, or germinate	make bigger or more
become abundant; increase rapidly
move in large numbers
be teeming, be abuzz