anatomical sphincter vs muscle

anatomical sphincter and muscle both are nouns.

Word	Noun	Adjective	Verb	Adverb
anatomical sphincter	Yes	No	No	No
muscle	Yes	No	Yes	No

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

Other hypernyms of anatomical sphincter include musculus.

anatomical sphincter (noun)	muscle (noun)
a ring of muscle that contracts to close an opening	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

anatomical sphincter (verb)	muscle (verb)
	make one's way by force