There are various synonyms for the phrase "turn out," which means to result or end up in a certain way or to attend an event. One such synonym is "proven," which refers to something being verified or confirmed. Another synonym is "develop," indicating how something has grown or progressed over time. "Materialize" is another term that can be used, describing how something has come into existence or become apparent. "Transpire" is another synonym that refers to how events have occurred or unfolded. Lastly, "show up" refers to actually attending an event or becoming visible to others. These synonyms can come in handy when a word or phrase is needed to convey meaning and avoid repetition.