nutria vs rodent

nutria and rodent both are nouns.

Word	Noun	Adjective	Verb	Adverb
nutria	Yes	No	No	No
rodent	Yes	No	No	No

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

nutria: aquatic South American rodent resembling a small beaver; bred for its fur
rodent: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of nutria include gnawer.

nutria (noun)	rodent (noun)
aquatic South American rodent resembling a small beaver; bred for its fur	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing