Lagostomus maximus vs gnawer

Lagostomus maximus and gnawer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lagostomus maximus	Yes	No	No	No
gnawer	Yes	No	No	No

As nouns, gnawer is a hypernym of Lagostomus maximus; that is, gnawer is a word with a broader meaning than Lagostomus maximus:

Lagostomus maximus: gregarious burrowing rodent larger than the chinchillas
gnawer: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of Lagostomus maximus include rodent.

Lagostomus maximus (noun)	gnawer (noun)
gregarious burrowing rodent larger than the chinchillas	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing