emissary vein vs vena emissaria

emissary vein and vena emissaria both are nouns.

Word	Noun	Adjective	Verb	Adverb
emissary vein	Yes	No	No	No
vena emissaria	Yes	No	No	No

As nouns, emissary vein and vena emissaria are synonyms defined as:

emissary vein and vena emissaria: one of several connecting veins in the scalp and head that drain blood from sinuses in the dura mater to veins outside the skull

emissary vein (noun)	vena emissaria (noun)
one of several connecting veins in the scalp and head that drain blood from sinuses in the dura mater to veins outside the skull	one of several connecting veins in the scalp and head that drain blood from sinuses in the dura mater to veins outside the skull