roasting vs cooking

roasting and cooking both are nouns.

Word	Noun	Adjective	Verb	Adverb
roasting	Yes	No	No	No
cooking	Yes	No	No	No

As nouns, cooking is a hypernym of roasting; that is, cooking is a word with a broader meaning than roasting:

roasting: cooking (meat) by dry heat in an oven (usually with fat added)
cooking: the act of preparing something (as food) by the application of heat

Other hypernyms of roasting include cookery, preparation.

roasting (noun)	cooking (noun)
cooking (meat) by dry heat in an oven (usually with fat added)	the act of preparing something (as food) by the application of heat