Water tanks are essential for storing and supplying water to households and communities. However, not all water tanks are created equal, and depending on the material and location, there may be different names used to describe them. Some synonyms for the term "water tank" include cistern, reservoir, well, rainwater harvesting tank, water storage container, and water tower. Cisterns are typically made of concrete and used for capturing rainwater. Reservoirs are much larger than cisterns and used for storing and distributing water to a wider area. Wells, on the other hand, are dug into the ground to access groundwater. Meanwhile, water storage containers are portable tanks used in emergency situations. Lastly, water towers are tall structures that use gravity to distribute water.