"Freestyle" is a widely used term that refers to a creative, improvisational approach to a wide range of activities. However, if you're looking to add a little variety to your writing or conversation, there are several synonyms that can be used interchangeably with "freestyle". Some of these include: improvisation, ad-libbing, spontaneous, unplanned, unscripted, off-the-cuff, impromptu, free-form. These synonyms can convey a similar sense of creativity and flexibility, and can be used in a variety of contexts, from music and art to public speaking and writing. So if you're tired of using "freestyle", try switching it up with these options.