accessory hemiazygos vein vs vena hemiazygos accessoria

accessory hemiazygos vein and vena hemiazygos accessoria both are nouns.

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

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

accessory hemiazygos 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 hemiazygos vein include accessory hemiazygous vein.

accessory hemiazygos 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