Location & Features:
* Geographic: riverbank, shore, embankment, levee, delta, floodplain, estuary, confluence, watershed
* Flora: riparian, willow, cottonwood, sycamore, alder, cattail, reeds, rushes
* Fauna: otter, beaver, heron, kingfisher, dragonfly, water snake, frog, fish
* Structures: pier, dock, boathouse, wharf, bridge, dam, weir
* Activities: fishing, boating, kayaking, canoeing, swimming, picnicking, hiking, walking, biking
Descriptive:
* Visual: winding, meandering, flowing, tranquil, serene, peaceful, picturesque, idyllic, verdant, lush, vibrant, teeming
* Sensory: cool, refreshing, damp, misty, fragrant, buzzing, chirping, gurgling, splashing, whispering
* Emotional: calming, restorative, inspiring, contemplative, nostalgic
Related Concepts:
* Hydrology: flow, current, discharge, erosion, sedimentation, water quality, water pollution
* Nature: ecosystem, biodiversity, wildlife habitat, conservation, sustainability
* Culture: river god, folklore, mythology, legend, history, navigation, trade
Other:
* Words with "river" in them: riverfront, riverine, riverside, riverwalk, riverbank, riverboat
* Words with "water" in them: waterfront, waterway, waterside, waterview, watery
This list is not exhaustive, but it gives you a good starting point for thinking about words related to riverside. The specific words you choose will depend on the context of your writing or speaking.