The document defines various types of water and water-related terms. It discusses acid water, soft water, melt water, fresh water, bottled water, drinking water, sewage, tributaries, the water cycle, condensation, rainfall, brackish water, acid rain, waterproof, waterland, hydrophilic, pollution, chlorination, floods, run-off, frost, hydrolysis, hydrophobic, dew point, clouds, dikes, sources, hail, the hydrosphere, showers, courses, rain gauges, and drizzle. It provides brief definitions or descriptions of each term.