vena iliaca vs vena

vena iliaca and vena both are nouns.

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

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

vena iliaca: one of three veins draining the pelvic area
vena: a blood vessel that carries blood from the capillaries toward the heart

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

vena iliaca (noun)	vena (noun)
one of three veins draining the pelvic area	a blood vessel that carries blood from the capillaries toward the heart