supinator vs musculus

supinator and musculus both are nouns.

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

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

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

Other hypernyms of supinator include muscle.

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