The word "outperformed" means to perform better than something else, and there are many words that can be used as synonyms for this word. Some common alternatives include excelled, surpassed, exceeded, outshone, outdone, bested, and outmatched. These words all emphasize that one thing is better than another, whether it's in terms of performance, accomplishments, or results. Additionally, words like outpaced, outran, and outdistanced can be used to describe instances where someone or something moves faster or further than others. Ultimately, it's important to choose the right synonym based on the context in which it's being used and the specific connotations it carries.