Trounces is a verb that means to defeat or beat someone or something decisively. There are many synonyms that we can use to replace the word trounces, such as thrashes, overwhelms, crushes, and routs. Other synonyms include demolishes, annihilates, vanquishes, steamrolls, and triumphs over. These words convey a sense of domination and superiority over the opponent. Other words that we can use to substitute trounces include eclipses, outclasses, overpowers, and overruns. These synonyms could be used in various contexts such as sports, business, and politics. They add more color and meaning to the sentence and help us communicate our thoughts more effectively.