murine vs gnawer

murine and gnawer both are nouns.

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

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

murine: a rodent that is a member of the family Muridae
gnawer: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of murine include rodent.

murine (noun)	gnawer (noun)
a rodent that is a member of the family Muridae	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

murine (adjective)	gnawer (adjective)
of or relating to or transmitted by a member of the family Muridae (rats and mice)