accessory hemiazygous vein vs vena hemiazygos accessoria

accessory hemiazygous vein and vena hemiazygos accessoria both are nouns.

Word	Noun	Adjective	Verb	Adverb
accessory hemiazygous vein	Yes	No	No	No
vena hemiazygos accessoria	Yes	No	No	No

As nouns, accessory hemiazygous vein and vena hemiazygos accessoria are synonyms defined as:

accessory hemiazygous vein and vena hemiazygos accessoria: a vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos vein

Other synonyms of accessory hemiazygous vein include accessory hemiazygos vein.

accessory hemiazygous vein (noun)	vena hemiazygos accessoria (noun)
a vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos vein	a vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos vein