jerboa vs gnawer

jerboa and gnawer both are nouns.

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

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

jerboa: mouselike jumping rodent
gnawer: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of jerboa include rodent.

jerboa (noun)	gnawer (noun)
mouselike jumping rodent	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing