gnawer vs capibara

gnawer and capibara both are nouns.

Word	Noun	Adjective	Verb	Adverb
gnawer	Yes	No	No	No
capibara	Yes	No	No	No

As nouns, capibara is a hyponym of gnawer; that is, capibara is a word with a more specific, narrower meaning than gnawer:

gnawer: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing
capibara: pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodent

gnawer (noun)	capibara (noun)
relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing	pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodent