systema nervosum periphericum vs peripheral nervous system

systema nervosum periphericum and peripheral nervous system both are nouns.

Word	Noun	Adjective	Verb	Adverb
systema nervosum periphericum	Yes	No	No	No
peripheral nervous system	Yes	No	No	No

As nouns, systema nervosum periphericum and peripheral nervous system are synonyms defined as:

systema nervosum periphericum and peripheral nervous system: the section of the nervous system lying outside the brain and spinal cord

systema nervosum periphericum (noun)	peripheral nervous system (noun)
the section of the nervous system lying outside the brain and spinal cord	the section of the nervous system lying outside the brain and spinal cord