The beaver-like rodent is often referred to as a muskrat, which is recognized for its reddish-brown fur and strong, stocky build. They have flattened tails and webbed hind feet, which help them to swim efficiently. Other synonyms that can be used to describe beaver-like rodents include nutria, coypu, and capybara. Nutria, also known as the river rat, are large, semi-aquatic rodents that are similar in appearance to muskrats. Coypu, also known as a river beaver, have thick orange-brown fur and live primarily in freshwater habitats. Capybaras are the largest living rodents and are native to South America. These synonyms can be used interchangeably, depending on the specific species and location of the beaver-like rodent.