The term GNAWING CREATURE can be summarized as a RODENT, which is a six-letter word. Rodents are mammals of the order Rodentia, which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. They are the most diverse mammalian order, with over 2, 000 species, including mice, rats, squirrels, porcupines, beavers, guinea pigs, hamsters, and voles. Rodents are found in almost every habitat on Earth, from deserts to forests, and they are known for their gnawing behavior, which helps them to obtain food and build nests.