The phrase "done in" can be used in various contexts to mean tired or exhausted. However, if you want to switch things up and use synonyms that convey the same message, here are some options. You can use words like drained, fatigued, depleted, worn out, or simply exhausted. These words can add variety to your writing and make your message more interesting. If you are emphasizing how physically tired you are, you can also use words like spent, knackered, pooped, or bushed. Regardless of the word you choose, make sure it conveys the right amount of exhaustion you are trying to get across to your readers or listeners.