hemizygos vein vs hemizygous vein

hemizygos vein and hemizygous vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
hemizygos vein	Yes	No	No	No
hemizygous vein	Yes	No	No	No

As nouns, hemizygos vein and hemizygous vein are synonyms defined as:

hemizygos vein and hemizygous vein: a continuation of the left ascending lumbar vein; crosses the midline at the 8th vertebra and empties into the azygos vein

Other synonyms of hemizygos vein include vena hemizygos.

hemizygos vein (noun)	hemizygous vein (noun)
a continuation of the left ascending lumbar vein; crosses the midline at the 8th vertebra and empties into the azygos vein	a continuation of the left ascending lumbar vein; crosses the midline at the 8th vertebra and empties into the azygos vein