supinator vs muscle

supinator and muscle both are nouns.

Word	Noun	Adjective	Verb	Adverb
supinator	Yes	No	No	No
muscle	Yes	No	Yes	No

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

supinator: a muscle (especially in the forearm) that produces or assists in supination
muscle: one of the contractile organs of the body

Other hypernyms of supinator include musculus.

supinator (noun)	muscle (noun)
a muscle (especially in the forearm) that produces or assists in supination	possessing muscular strength
	authority or power or force (especially when used in a coercive way)
	one of the contractile organs of the body
	animal tissue consisting predominantly of contractile cells
	a bully employed as a thug or bodyguard

supinator (verb)	muscle (verb)
	make one's way by force