"Amped up" is an expression used to describe a person who is extremely excited, energized or pumped up. If you're looking for some synonyms to use in place of "amped up", you can consider using words like thrilled, excited, elated, ecstatic, enthusiastic, jazzed, hyped, fired up, exhilarated, invigorated, vivacious, or enthusiastic. These words can be used interchangeably to convey the same emotion of heightened energy and enthusiasm. By using synonyms, you can add variety to your writing and make it more interesting and engaging. Whether you're describing the energy of a crowd, an athlete, or an event, these words will help you to better articulate your ideas.