Rager is a term used to describe a wild and boisterous party or event. While it may be a common term, there are several synonyms available to convey the same idea. These include words like blowout, bash, shindig, extravaganza, and gala. Each of these synonyms presents a slightly different connotation, but all share the common thread of being an exciting and lively gathering. So, whether you're planning a rager for your friends or attending someone else's, there's no shortage of words to describe the celebration.