systema nervosum centrale vs medulla spinalis

systema nervosum centrale and medulla spinalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
systema nervosum centrale	Yes	No	No	No
medulla spinalis	Yes	No	No	No

systema nervosum centrale (noun)	medulla spinalis (noun)
the portion of the vertebrate nervous system consisting of the brain and spinal cord	a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain; a long tubelike structure extending from the base of the brain through the vertebral canal to the upper lumbar region