urethral sphincter vs musculus sphincter urethrae

urethral sphincter and musculus sphincter urethrae both are nouns.

Word	Noun	Adjective	Verb	Adverb
urethral sphincter	Yes	No	No	No
musculus sphincter urethrae	Yes	No	No	No

As nouns, urethral sphincter and musculus sphincter urethrae are synonyms defined as:

urethral sphincter and musculus sphincter urethrae: a striated sphincter muscle that constricts the urethra

urethral sphincter (noun)	musculus sphincter urethrae (noun)
a striated sphincter muscle that constricts the urethra	a striated sphincter muscle that constricts the urethra