Banderole can be defined as a long, narrow flag or banner that is often used for decorative or advertising purposes. However, there are several synonyms for the word "banderole" that can be used interchangeably to give variety and depth to your writing. For instance, "streamer" or "pennant" can be used to refer to a decorative strip of cloth or paper that can be hung or displayed horizontally. Another synonym for "banderole" is "bannerette," which is a small banner or flag that is often used for advertising purposes. Other synonyms include "pendant," "swag," and "pennon," which are all variations of a decorative flag or banner.