The phrase "dies over" refers to something that is no longer of interest or has lost its appeal. There are several synonyms for this phrase, including "loses its luster," "fizzles out," "falls flat," "loses its charm," "loses its novelty," "loses its excitement," and "loses its shine." These phrases can be used in various contexts, whether it be discussing a relationship that has lost its spark or a product that is no longer in demand. By employing these synonyms, one can inject more precision and variety into their language, making their description of a situation or object more impactful and engaging.