burgeon forth vs spud

burgeon forth is not a noun while spud is a noun.

Word	Noun	Adjective	Verb	Adverb
burgeon forth	No	No	Yes	No
spud	Yes	No	Yes	No

As verbs, burgeon forth and spud are synonyms defined as:

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

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

burgeon forth (verb)	spud (verb)
produce buds, branches, or germinate	produce buds, branches, or germinate
	initiate drilling operations, as for petroleum