Voice-over is a commonly used term in the entertainment industry. However, if you're looking to vary your vocabulary, here are some alternatives you might consider: narration, off-screen commentary, spoken commentary, vocal interpretation, voice acting, dubbed audio, announcer's voice, audio narration, and voice characterization. These alternatives may better suit a specific project or type of media. For example, voice characterization may be more appropriate for animation whereas dubbed audio may be used for foreign language films. Whether you're a writer, producer or content creator, using appropriate synonyms can help make your work more effective and engaging for your audience.