venae ciliares vs vena

venae ciliares and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
venae ciliares	Yes	No	No	No
vena	Yes	No	No	No

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

venae ciliares: small veins coming from the ciliary body
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of venae ciliares include vein, venous blood vessel.

venae ciliares (noun)	vena (noun)
small veins coming from the ciliary body	a blood vessel that carries blood from the capillaries toward the heart