anatomical sphincter vs sphincter

anatomical sphincter and sphincter both are nouns.

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

As nouns, anatomical sphincter and sphincter are synonyms defined as:

anatomical sphincter and sphincter: a ring of muscle that contracts to close an opening

Other synonyms of anatomical sphincter include sphincter muscle.

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