When it comes to preparing for a performance or presentation, rehearsal is the key to success. However, there are many words that can be used in place of rehearsal, if you want to mix things up. For instance, try using the word "practice" instead. It has the same meaning and is much more commonly used. Another option is to use the word "run-through" to indicate that you are going through the motions of the performance. Or, instead of using the word "rehearsal" outright, you can phrase it as "preparation" or "training session" to add a little more emphasis to the process of getting ready.