fourth cranial nerve vs trochlear

fourth cranial nerve and trochlear both are nouns.

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

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

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

Other synonyms of fourth cranial nerve include trochlear nerve, trochlearis.

fourth cranial nerve (noun)	trochlear (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