The phrase "evening the score" means to get revenge on someone for a past wrongdoing or to make things equal after a previous imbalance. There are several synonyms for this phrase such as giving someone their comeuppance, turning the tables, getting one's own back, tit for tat, and settling the score. These phrases indicate the idea of revenge or retaliation and often involve the idea of an equal exchange. By using synonyms for "evening the score," you can add a new level of emphasis and detail to your writing or speech.