gnawer
/ˈnɔːər/
noun
- An animal or person that gnaws, especially a rodent such as a mouse, rat, or beaver.
- The trap was set to catch any gnawer that had been damaging the wiring.
- Rabbits are natural gnawers and need hard objects to keep their teeth healthy.
- Beavers are expert gnawers, able to cut down large trees with their teeth.