dormouse vs gnawer

dormouse and gnawer both are nouns.

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

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

dormouse: small furry-tailed squirrel-like Old World rodent that becomes torpid in cold weather
gnawer: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of dormouse include rodent.

dormouse (noun)	gnawer (noun)
small furry-tailed squirrel-like Old World rodent that becomes torpid in cold weather	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing