sprout vs pullulate

sprout is a noun but pullulate is not a noun.

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

As verbs, sprout and pullulate are synonyms defined as:

Other synonyms of sprout include bourgeon, burgeon forth, germinate, shoot, spud.

sprout (noun)	pullulate (noun)
a newly grown bud (especially from a germinating seed)
any new growth of a plant such as a new branch or a bud

sprout (verb)	pullulate (verb)
put forth and grow sprouts or shoots	breed freely and abundantly
produce buds, branches, or germinate	produce buds, branches, or germinate
	become abundant; increase rapidly
	move in large numbers
	be teeming, be abuzz