trochlear vs fourth cranial nerve

trochlear and fourth cranial nerve both are nouns.

Word	Noun	Adjective	Verb	Adverb
trochlear	Yes	No	No	No
fourth cranial nerve	Yes	No	No	No

As nouns, trochlear and fourth cranial nerve are synonyms defined as:

trochlear and fourth cranial nerve: either of the two cranial nerves on either side that control the superior oblique muscles of the eyes

Other synonyms of trochlear include trochlear nerve, trochlearis.

trochlear (noun)	fourth cranial nerve (noun)
either of the two cranial nerves on either side that control the superior oblique muscles of the eyes	either of the two cranial nerves on either side that control the superior oblique muscles of the eyes