The word "cue" is often used to refer to a signal or sign that indicates the beginning of an action, event, or performance. Some synonyms for "cue" include signal, prompt, indication, prompter, cue card, and hint. These words are often used in the context of theatre, film, and music to indicate the moment when actors, musicians, or other performers should start their performances or actions. Other synonyms for "cue" could vary depending on the context of usage, such as in sports, games or language. However, all of these words suggest a beginning point or starting action that is prompted by external means.