Stream is a common word that is used to describe a flowing body of water, whether it's a small brook or a larger river. However, there are several other synonyms you can use for stream to add variety to your writing. Some of these synonyms include rivulet, creek, brook, rill, runnel, and beck. These words can be used interchangeably with stream to evoke a different style and tone to your writing. For instance, using the word brook might convey a sense of tranquility and peace, while using the word rill might evoke a more dramatic and intense feeling. Experimenting with these synonyms can add depth and texture to your writing.