The phrase "rings up the curtain" is a theatrical expression used to describe the start of a performance. It signifies the moment when the curtains are lifted or opened to reveal the stage. However, there are several other synonyms that can be used to describe this action, such as "lifts the veil," "unveils the stage," "draws back the drapery," "opens the curtain," or "starts the show." These synonyms are commonly used in the world of theatre and entertainment and can add variety and interest to descriptions of performances and events. Each synonym creates a unique and vivid image, adding to the overall magic and excitement of the experience.