vena pulmonalis superior vs superior pulmonary vein

vena pulmonalis superior and superior pulmonary vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena pulmonalis superior	Yes	No	No	No
superior pulmonary vein	Yes	No	No	No

As nouns, vena pulmonalis superior and superior pulmonary vein are synonyms defined as:

vena pulmonalis superior and superior pulmonary vein: either of two pulmonary veins (left and right) returning blood from the superior lobes of the lungs

vena pulmonalis superior (noun)	superior pulmonary vein (noun)
either of two pulmonary veins (left and right) returning blood from the superior lobes of the lungs	either of two pulmonary veins (left and right) returning blood from the superior lobes of the lungs