gnawer vs agouti

gnawer and agouti both are nouns.

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

As nouns, agouti is a hyponym of gnawer; that is, agouti 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
agouti: agile long-legged rabbit-sized rodent of Central America and South America and the West Indies; valued as food

gnawer (noun)	agouti (noun)
relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing	agile long-legged rabbit-sized rodent of Central America and South America and the West Indies; valued as food