vena cerebri magna vs great cerebral vein

vena cerebri magna and great cerebral vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena cerebri magna	Yes	No	No	No
great cerebral vein	Yes	No	No	No

As nouns, vena cerebri magna and great cerebral vein are synonyms defined as:

vena cerebri magna and great cerebral vein: a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus

vena cerebri magna (noun)	great cerebral vein (noun)
a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus	a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus