gridiron vs cooking utensil

gridiron and cooking utensil both are nouns.

Word	Noun	Adjective	Verb	Adverb
gridiron	Yes	No	No	No
cooking utensil	Yes	No	No	No

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

gridiron: a cooking utensil of parallel metal bars; used to grill fish or meat
cooking utensil: a kitchen utensil made of material that does not melt easily; used for cooking

Other hypernyms of gridiron include cookware.

gridiron (noun)	cooking utensil (noun)
a cooking utensil of parallel metal bars; used to grill fish or meat	a kitchen utensil made of material that does not melt easily; used for cooking
the playing field on which football is played