roast vs debunk

roast is a noun but debunk is not a noun.

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

As verbs, debunk is a hyponym of roast; that is, debunk is a word with a more specific, narrower meaning than roast:

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

Other hyponyms of roast include tease, lampoon, satirise, satirize, expose, stultify.

roast (noun)	debunk (noun)
negative criticism
a piece of meat roasted or for roasting and of a size for slicing into more than one portion

roast (adjective)	debunk (adjective)
(meat) cooked by dry heat in an oven

roast (verb)	debunk (verb)
cook with dry heat, usually in an oven	expose while ridiculing; especially of pretentious or false claims and ideas
subject to laughter or ridicule