cookie sheet vs cooking utensil

cookie sheet and cooking utensil both are nouns.

Word	Noun	Adjective	Verb	Adverb
cookie sheet	Yes	No	No	No
cooking utensil	Yes	No	No	No

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

cookie sheet: a cooking utensil consisting of a flat rectangular metal sheet used for baking cookies or biscuits
cooking utensil: a kitchen utensil made of material that does not melt easily; used for cooking

Other hypernyms of cookie sheet include cookware.

cookie sheet (noun)	cooking utensil (noun)
a cooking utensil consisting of a flat rectangular metal sheet used for baking cookies or biscuits	a kitchen utensil made of material that does not melt easily; used for cooking