choroidal artery vs artery

choroidal artery and artery both are nouns.

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

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

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

choroidal artery (noun)	artery (noun)
an artery that supplies the choroid plexus	a major thoroughfare that bears important traffic
	a blood vessel that carries blood from the heart to the body