The Hypolydian mode is a type of musical mode that dates back to the ancient Greeks, specifically within the melodies of the Dorian and Phrygian modes. There are several synonyms for the Hypolydian mode, including the Locrian mode, the Aeolian mode, and the Phrygian dominant scale. These synonyms refer to different variations of the same mode, each with their own unique sound and character. The Hypolydian mode is often associated with somber and emotional music, and has been used by composers throughout history to create works that are both powerful and moving. Whether you refer to it as the Hypolydian mode, the Locrian mode, or the Phrygian dominant scale, this musical mode can evoke an array of feelings and emotions in listeners.