Giant sloths, known for their massive size, were prehistoric creatures that roamed the earth millions of years ago. These large, slow-moving beasts have been extinct for thousands of years, but their legacy lives on. There are a variety of synonyms for the term "giant sloth," including the megatherium, which translates to "great beast." Other synonyms include the eremotherium, which translates to "lonely beast," the mylodon, which means "molar tooth," and the megalonix, which means "large claw." These names describe the unique features of the giant sloth, which shared the earth with mammoths, sabre-toothed tigers, and other now-extinct creatures.