jejunal artery vs artery

jejunal artery and artery both are nouns.

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

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

jejunal artery: an artery that is a branch of the superior mesenteric artery that supplies the jejunum
artery: a blood vessel that carries blood from the heart to the body

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

jejunal artery (noun)	artery (noun)
an artery that is a branch of the superior mesenteric artery that supplies the jejunum	a major thoroughfare that bears important traffic
	a blood vessel that carries blood from the heart to the body