antagonistic muscle vs muscle

antagonistic muscle and muscle both are nouns.

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

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

antagonistic muscle: (physiology) a muscle that opposes the action of another
muscle: one of the contractile organs of the body

Other hypernyms of antagonistic muscle include musculus.

antagonistic muscle (noun)	muscle (noun)
(physiology) a muscle that opposes the action of another	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

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