roaster vs Oven Stuffer

roaster and Oven Stuffer both are nouns.

Word	Noun	Adjective	Verb	Adverb
roaster	Yes	No	No	No
Oven Stuffer	Yes	No	No	No

As nouns, Oven Stuffer is a hyponym of roaster; that is, Oven Stuffer is a word with a more specific, narrower meaning than roaster:

Other hyponyms of roaster include Oven Stuffer Roaster.

roaster (noun)	Oven Stuffer (noun)
a special cooking pan for roasting	a brand name for a roasting chicken
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)