vena pulmanalis inferior vs inferior pulmonary vein

vena pulmanalis inferior and inferior pulmonary vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena pulmanalis inferior	Yes	No	No	No
inferior pulmonary vein	Yes	No	No	No

As nouns, vena pulmanalis inferior and inferior pulmonary vein are synonyms defined as:

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

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