burro vs domestic ass

burro and domestic ass both are nouns.

Word	Noun	Adjective	Verb	Adverb
burro	Yes	No	No	No
domestic ass	Yes	No	No	No

As nouns, domestic ass is a hypernym of burro; that is, domestic ass is a word with a broader meaning than burro:

burro: small donkey used as a pack animal
domestic ass: domestic beast of burden descended from the African wild ass; patient but stubborn

Other hypernyms of burro include donkey, Equus asinus.

burro (noun)	domestic ass (noun)
small donkey used as a pack animal	domestic beast of burden descended from the African wild ass; patient but stubborn