The term "didst dishes" is an outdated phrase that is no longer commonly used in modern English. However, there are some synonyms that can be used in its place, depending on the context. For example, if the phrase is meant to describe someone washing or cleaning dishes, synonyms like washed dishes, cleaned dishes, and did the dishes can be used. If the phrase is meant to convey that someone completed a task or fulfilled a responsibility, synonyms like completed chores, finished duties, and fulfilled obligations can be used. It's important to choose the appropriate synonym based on the intended meaning and the context of the sentence.