Rakshasas are mythical creatures mentioned in Indian mythology. They are often portrayed as demons or evil spirits and are known for their wickedness and cruelty. Some synonyms for the word Rakshasas include Asura, Kalanemi, and Mahisha. Asuras are legendary beings that are often depicted as enemies of the gods and are known for their powerful nature. Kalanemi was a powerful demon in Hindu mythology who was known for his ability to change forms. Mahisha was a demon king known for his immense strength and power. All of these terms are often used to describe the dark, malevolent forces that exist in the world of Indian mythology.