Azi Dahaka, also known as the "serpent demon," is a character from Persian mythology. As for synonyms for the term, there are a few different options depending on the context and language. In Persian, Azi Dahaka can also be referred to as Zahhāk or Zohak. In English, he may be referred to as the "three-headed dragon" or "evil serpent king." Other synonyms might include "demon king" or "mythical beast." Regardless of the term used, Azi Dahaka is generally portrayed as a fearsome and powerful figure, often associated with darkness and chaos.