spud vs pullulate

spud is a noun but pullulate is not a noun.

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

As verbs, spud and pullulate are synonyms defined as:

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

spud (noun)	pullulate (noun)
a sharp hand shovel for digging out roots and weeds
an edible tuber native to South America; a staple food of Ireland

spud (verb)	pullulate (verb)
produce buds, branches, or germinate	breed freely and abundantly
initiate drilling operations, as for petroleum	produce buds, branches, or germinate
	become abundant; increase rapidly
	move in large numbers
	be teeming, be abuzz