fifth cranial nerve vs trigeminus

fifth cranial nerve and trigeminus both are nouns.

Word	Noun	Adjective	Verb	Adverb
fifth cranial nerve	Yes	No	No	No
trigeminus	Yes	No	No	No

As nouns, fifth cranial nerve and trigeminus are synonyms defined as:

fifth cranial nerve and trigeminus: the main sensory nerve of the face and motor nerve for the muscles of mastication

Other synonyms of fifth cranial nerve include nervus trigeminus, trigeminal, trigeminal nerve.

fifth cranial nerve (noun)	trigeminus (noun)
the main sensory nerve of the face and motor nerve for the muscles of mastication	the main sensory nerve of the face and motor nerve for the muscles of mastication