vagus nerve vs cranial nerve

vagus nerve and cranial nerve both are nouns.

Word	Noun	Adjective	Verb	Adverb
vagus nerve	Yes	No	No	No
cranial nerve	Yes	No	No	No

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

vagus nerve: a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera
cranial nerve: any of the 12 paired nerves that originate in the brain stem

vagus nerve (noun)	cranial nerve (noun)
a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera	any of the 12 paired nerves that originate in the brain stem