The term "voice overs" can be substituted with a variety of synonyms depending on the context. These synonyms include voice acting, narration, dubbing, and commentary. While voice acting and voice overs are similar, the former refers to providing voices for characters in animated movies, video games, and commercials. Narration usually refers to the spoken content of a documentary. Dubbing is about replacing the original language of a movie with another. And commentary, something usually done during sports events, is providing a spoken analysis of what's happening. All these synonyms are used in different contexts, but all require the same skill - the ability to speak fluently and clearly convey the desired message.