vena subclavia vs subclavian vein

vena subclavia and subclavian vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena subclavia	Yes	No	No	No
subclavian vein	Yes	No	No	No

As nouns, vena subclavia and subclavian vein are synonyms defined as:

vena subclavia and subclavian vein: a continuation of the axillary vein; joins the internal jugular to form the brachiocephalic vein

vena subclavia (noun)	subclavian vein (noun)
a continuation of the axillary vein; joins the internal jugular to form the brachiocephalic vein	a continuation of the axillary vein; joins the internal jugular to form the brachiocephalic vein