vena jugularis vs jugular vein

vena jugularis and jugular vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena jugularis	Yes	No	No	No
jugular vein	Yes	No	No	No

As nouns, vena jugularis and jugular vein are synonyms defined as:

vena jugularis and jugular vein: veins in the neck that return blood from the head

Other synonyms of vena jugularis include jugular.

vena jugularis (noun)	jugular vein (noun)
veins in the neck that return blood from the head	veins in the neck that return blood from the head