cubital nerve vs nervus

cubital nerve and nervus both are nouns.

Word	Noun	Adjective	Verb	Adverb
cubital nerve	Yes	No	No	No
nervus	Yes	No	No	No

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

cubital nerve: a nerve running along the inner side of the arm and passing near the elbow; supplies intrinsic muscles of the hand and the skin of the medial side of the hand
nervus: any bundle of nerve fibers running to various organs and tissues of the body

Other hypernyms of cubital nerve include nerve.

cubital nerve (noun)	nervus (noun)
a nerve running along the inner side of the arm and passing near the elbow; supplies intrinsic muscles of the hand and the skin of the medial side of the hand	any bundle of nerve fibers running to various organs and tissues of the body