Equus asinus vs burro

Equus asinus and burro both are nouns.

Word	Noun	Adjective	Verb	Adverb
Equus asinus	Yes	No	No	No
burro	Yes	No	No	No

As nouns, burro is a hyponym of Equus asinus; that is, burro is a word with a more specific, narrower meaning than Equus asinus:

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

Other hyponyms of Equus asinus include moke.

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