The term 'Beaverlike Rodent' refers to two species of aquatic rodents, the NUTRIA (6 letters) and the COYPU (5 letters). NUTRIA are large, semi-aquatic rodents native to South America, with a thick, dark brown fur and webbed hind feet. They are also known as 'river rats' or 'COYPU rats'. COYPU, on the other hand, are smaller than NUTRIA and have a lighter brown fur. They are native to South America and are also semi-aquatic, living in wetlands and rivers. Both species are considered to be pests due to their destructive feeding habits.