tympanic vein vs vena

tympanic vein and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
tympanic vein	Yes	No	No	No
vena	Yes	No	No	No

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

tympanic vein: veins from the tympanic cavity that empty into the retromandibular vein
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of tympanic vein include vein, venous blood vessel.

tympanic vein (noun)	vena (noun)
veins from the tympanic cavity that empty into the retromandibular vein	a blood vessel that carries blood from the capillaries toward the heart