The phrase "came back" can be replaced with a variety of synonyms depending on the context and tone of the sentence. For instance, "returned," "reappeared," "resurfaced," and "came home" can all be used as synonyms when describing someone's arrival. Other possible options include "came again," "made a comeback," "came from afar," "showed up once more," or "circled back." In a more figurative sense, one might also use phrases like "picked up where they left off," "re-engaged," or "got back on track." By using creative synonyms, writers and speakers can add variety and interest to their language.