posterior serratus muscle vs musculus serratus posterior

posterior serratus muscle and musculus serratus posterior both are nouns.

Word	Noun	Adjective	Verb	Adverb
posterior serratus muscle	Yes	No	No	No
musculus serratus posterior	Yes	No	No	No

As nouns, posterior serratus muscle and musculus serratus posterior are synonyms defined as:

posterior serratus muscle and musculus serratus posterior: skeletal muscle that draws the rib cage backward and downward

Other synonyms of posterior serratus muscle include serratus posterior.

posterior serratus muscle (noun)	musculus serratus posterior (noun)
skeletal muscle that draws the rib cage backward and downward	skeletal muscle that draws the rib cage backward and downward