* Formal: The orchestra held a rehearsal for their upcoming concert.
* Informal: We had a rehearsal for the play and it was a little chaotic.
* Specific: The rehearsal focused on perfecting the final act of the ballet.
* Figurative: Life is like a rehearsal for something bigger, but we don't know what that is yet.
* Descriptive: The rehearsal was filled with the sound of clanging instruments and enthusiastic voices.
The best way to use "rehearsal" depends on the context of your sentence.