cheek muscle vs facial muscle

cheek muscle and facial muscle both are nouns.

Word	Noun	Adjective	Verb	Adverb
cheek muscle	Yes	No	No	No
facial muscle	Yes	No	No	No

As nouns, facial muscle is a hypernym of cheek muscle; that is, facial muscle is a word with a broader meaning than cheek muscle:

cheek muscle: a muscle that flattens the cheek and retracts the angle of the mouth
facial muscle: any of the skeletal muscles of the face

cheek muscle (noun)	facial muscle (noun)
a muscle that flattens the cheek and retracts the angle of the mouth	any of the skeletal muscles of the face