debunk vs ridicule

debunk is not a noun while ridicule is a noun.

Word	Noun	Adjective	Verb	Adverb
debunk	No	No	Yes	No
ridicule	Yes	No	Yes	No

As verbs, ridicule is a hypernym of debunk; that is, ridicule is a word with a broader meaning than debunk:

debunk: expose while ridiculing; especially of pretentious or false claims and ideas
ridicule: subject to laughter or ridicule

Other hypernyms of debunk include blackguard, guy, jest at, laugh at, make fun, poke fun, rib, roast.

debunk (noun)	ridicule (noun)
	the act of deriding or treating with contempt
	language or behavior intended to mock or humiliate

debunk (verb)	ridicule (verb)
expose while ridiculing; especially of pretentious or false claims and ideas	subject to laughter or ridicule