capillary artery vs arteria

capillary artery and arteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
capillary artery	Yes	No	No	No
arteria	Yes	No	No	No

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

capillary artery: one of the small thin-walled arteries that end in capillaries
arteria: a blood vessel that carries blood from the heart to the body

Other hypernyms of capillary artery include arterial blood vessel, artery.

capillary artery (noun)	arteria (noun)
one of the small thin-walled arteries that end in capillaries	a blood vessel that carries blood from the heart to the body