muffin case vs cooking utensil

muffin case and cooking utensil both are nouns.

Word	Noun	Adjective	Verb	Adverb
muffin case	Yes	No	No	No
cooking utensil	Yes	No	No	No

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

muffin case: a round sheet of paper, foil, or silicone with scallop-pressed edges, giving the muffin a round cup shape.
cooking utensil: a kitchen utensil made of material that does not melt easily; used for cooking

Other hypernyms of muffin case include cookware, cup.

muffin case (noun)	cooking utensil (noun)
a round sheet of paper, foil, or silicone with scallop-pressed edges, giving the muffin a round cup shape.	a kitchen utensil made of material that does not melt easily; used for cooking