rat chinchilla vs rodent

rat chinchilla and rodent both are nouns.

Word	Noun	Adjective	Verb	Adverb
rat chinchilla	Yes	No	No	No
rodent	Yes	No	No	No

As nouns, rodent is a hypernym of rat chinchilla; that is, rodent is a word with a broader meaning than rat chinchilla:

rat chinchilla: ratlike rodent with soft fur and large ears of the Andes
rodent: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of rat chinchilla include gnawer.

rat chinchilla (noun)	rodent (noun)
ratlike rodent with soft fur and large ears of the Andes	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing