vena pectoralis vs vena

vena pectoralis and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena pectoralis	Yes	No	No	No
vena	Yes	No	No	No

As nouns, vena is a hypernym of vena pectoralis; that is, vena is a word with a broader meaning than vena pectoralis:

vena pectoralis: veins that drain the pectoral muscles and empty into the subclavian vein
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of vena pectoralis include vein, venous blood vessel.

vena pectoralis (noun)	vena (noun)
veins that drain the pectoral muscles and empty into the subclavian vein	a blood vessel that carries blood from the capillaries toward the heart