nervus spinalis vs nervus

nervus spinalis and nervus both are nouns.

Word	Noun	Adjective	Verb	Adverb
nervus spinalis	Yes	No	No	No
nervus	Yes	No	No	No

As nouns, nervus is a hypernym of nervus spinalis; that is, nervus is a word with a broader meaning than nervus spinalis:

nervus spinalis: any of the 31 pairs of nerves emerging from each side of the spinal cord (each attached to the cord by two roots: ventral and dorsal)
nervus: any bundle of nerve fibers running to various organs and tissues of the body

Other hypernyms of nervus spinalis include nerve.

nervus spinalis (noun)	nervus (noun)
any of the 31 pairs of nerves emerging from each side of the spinal cord (each attached to the cord by two roots: ventral and dorsal)	any bundle of nerve fibers running to various organs and tissues of the body