marmot vs gnawer

marmot and gnawer both are nouns.

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

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

marmot: stocky coarse-furred burrowing rodent with a short bushy tail found throughout the Northern Hemisphere; hibernates in winter
gnawer: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of marmot include rodent.

marmot (noun)	gnawer (noun)
stocky coarse-furred burrowing rodent with a short bushy tail found throughout the Northern Hemisphere; hibernates in winter	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing