venae meningeae vs vena

venae meningeae and vena both are nouns.

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

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

venae meningeae: veins at accompany the meningeal arteries
vena: a blood vessel that carries blood from the capillaries toward the heart

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

venae meningeae (noun)	vena (noun)
veins at accompany the meningeal arteries	a blood vessel that carries blood from the capillaries toward the heart