Wild oxen are large, horned mammals that are found in many parts of the world. They are related to cattle and bison, and two of the most common species are YAKS (4 letters) and gaur (5 letters). YAKS are found in the Himalayan region of Asia, while gaur are found in India, Southeast Asia, and parts of China. Both species are known for their strength and hardiness, and they are often used as beasts of burden.