Mithan, also known as gayal or domesticated gaur, is a type of large wild cattle native to South Asia. While there are not many words that are exact synonyms for mithan, there are some related terms that could be used interchangeably in specific contexts. For example, "gaur" is often used to refer to mithan, and the words "bison" and "buffalo" are sometimes used as well. However, it is important to note that these animals are not exactly the same as mithan and may have different physical characteristics and habitats. Overall, mithan remains a unique and highly valued animal in many parts of South Asia, both for its cultural significance and its practical uses such as for dairy and meat production.