capillary artery vs arteriola

capillary artery and arteriola both are nouns.

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

As nouns, capillary artery and arteriola are synonyms defined as:

capillary artery and arteriola: one of the small thin-walled arteries that end in capillaries

Other synonyms of capillary artery include arteriole.

capillary artery (noun)	arteriola (noun)
one of the small thin-walled arteries that end in capillaries	one of the small thin-walled arteries that end in capillaries