mountain viscacha vs mountain chinchilla

mountain viscacha and mountain chinchilla both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain viscacha	Yes	No	No	No
mountain chinchilla	Yes	No	No	No

As nouns, mountain viscacha and mountain chinchilla are synonyms defined as:

mountain viscacha and mountain chinchilla: a rodent native to the mountains of Chile and Peru and now bred in captivity

mountain viscacha (noun)	mountain chinchilla (noun)
a rodent native to the mountains of Chile and Peru and now bred in captivity	a rodent native to the mountains of Chile and Peru and now bred in captivity