The word "pepped up" means to add energy or excitement to someone or something. Synonyms for this phrase include invigorated, stimulated, aroused, animated, encouraged, and galvanized. These words have a similar meaning to "pepped up" and can be used interchangeably. For instance, if you are feeling down and need to be more pepped up, you might say, "I need something to invigorate me." Similarly, you could say, "She was stimulated by the challenge ahead." These synonyms help add variety to your writing and make your language more dynamic and engaging. So, why not sprinkle some new words into your vocabulary the next time you're looking to give someone or something a boost?