Streamside is a single word that describes the area directly adjacent to a stream or river. However, there are several synonyms that can be used to describe this location, including riparian, riverside, brookside, and waterfront. Each of these words conveys the same idea as streamside, but with a slightly different twist. For example, riverside may conjure up images of a larger body of water, while brookside may suggest a smaller, babbling brook. In any case, these synonyms can help to add variety to your writing and allow you to paint a vivid picture of the scene you are describing.