vena bronchialis vs bronchial vein

vena bronchialis and bronchial vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena bronchialis	Yes	No	No	No
bronchial vein	Yes	No	No	No

As nouns, vena bronchialis and bronchial vein are synonyms defined as:

vena bronchialis and bronchial vein: veins serving the bronchi; empty into the azygos vein

vena bronchialis (noun)	bronchial vein (noun)
veins serving the bronchi; empty into the azygos vein	veins serving the bronchi; empty into the azygos vein