What is another word for River Styx?
Pronunciation: [ɹˈɪvə stˈɪks] (IPA) 
River Styx is the mythical river that separates the world of the living from the world of the dead. In ancient Greek mythology, it is the river that the god Hermes guides the souls of the dead across to reach the underworld. While there are no exact synonyms for River Styx, there are some related terms used in mythology and literature. Some of these include Acheron, Cocytus, Lethe, and Phlegethon. Acheron is another river of the underworld, while Cocytus is characterized as a river of lamentation. Lethe is a river in Hades whose waters cause forgetfulness, and Phlegethon is a river of fire. These rivers, like River Styx, have significant roles in ancient mythology and literature.
