When it comes to searching for synonyms of "fill time," a number of options are readily available. One popular option is the phrase "pass the time," which entails engaging in activities for the purpose of making time or passing it productively. Other phrases that convey similar meanings include "kill time," "occupy time," or "whittle away time." Similarly, the phrase "make the most of one's time" can convey the idea of engaging in enjoyable or productive activities so as to not waste time. Ultimately, the key is to use a phrase that conveys the appropriate meaning while also serving as a creative or engaging alternative to the more mundane phrase of "filling time".