trochlearis vs cranial nerve

trochlearis and cranial nerve both are nouns.

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

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

trochlearis: either of the two cranial nerves on either side that control the superior oblique muscles of the eyes
cranial nerve: any of the 12 paired nerves that originate in the brain stem

trochlearis (noun)	cranial nerve (noun)
either of the two cranial nerves on either side that control the superior oblique muscles of the eyes	any of the 12 paired nerves that originate in the brain stem