A wild beast is a ferocious animal that roams the wilderness. When it comes to synonyms, there are many words that can replace "wild beast" depending on the context. Some of the commonly used words are savage, brute, predator, hunter, monster, beast, creature, and animal. The word feral is used to describe a wild animal that has escaped captivity and returned to the wild. A vicious and aggressive animal is called a maneater or a mankiller. Some animals like lions, tigers, and cheetahs are referred to as big cats or simply as cats. Similarly, some animals like wolves and hyenas are called wild dogs.