roaster vs cooking pan

roaster and cooking pan both are nouns.

Word	Noun	Adjective	Verb	Adverb
roaster	Yes	No	No	No
cooking pan	Yes	No	No	No

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

Other hypernyms of roaster include pan.

roaster (noun)	cooking pan (noun)
a special cooking pan for roasting	cooking utensil consisting of a wide metal vessel
flesh of a large young chicken over 3 1/2 lb suitable for roasting
a cook who roasts food
a harsh or humorous critic (sometimes intended as a facetious compliment)