Four-legged is a term used to describe animals that have four legs. However, there are several other words that mean the same thing. The word "quadruped" is a more technical term that describes any four-legged animal. Some people use the word "tetrapod," which is a more specialized term that describes animals that have four limbs. "Quadrumanous" refers to primates such as monkeys and apes that have four limbs, two of which are arms. Another word that is used to describe four-legged animals is "quadrupedal." No matter what word you use, they all describe animals that have four legs and are a crucial part of the animal kingdom.