roast vs cooked

roast is a noun but cooked is not a noun.

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

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

roast (adjective)	cooked (adjective)
(meat) cooked by dry heat in an oven	having been prepared for eating by the application of heat

roast (verb)	cooked (verb)
cook with dry heat, usually in an oven
subject to laughter or ridicule