ethmoidal artery vs artery

ethmoidal artery and artery both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethmoidal artery	Yes	No	No	No
artery	Yes	No	No	No

As nouns, artery is a hypernym of ethmoidal artery; that is, artery is a word with a broader meaning than ethmoidal artery:

ethmoidal artery: a branch of the ophthalmic artery supplying structures in and around the nasal capsule
artery: a blood vessel that carries blood from the heart to the body

Other hypernyms of ethmoidal artery include arteria, arterial blood vessel.

ethmoidal artery (noun)	artery (noun)
a branch of the ophthalmic artery supplying structures in and around the nasal capsule	a major thoroughfare that bears important traffic
	a blood vessel that carries blood from the heart to the body