fourth cranial nerve vs trochlearis

fourth cranial nerve and trochlearis both are nouns.

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

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

fourth cranial nerve and trochlearis: 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, trochlear nerve.

fourth cranial nerve (noun)	trochlearis (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