Faucet water, or tap water, is a term commonly used to refer to the water that comes out of a faucet or tap. However, there are several other synonyms for this term that people can use for a variety of reasons. Some of the common synonyms for faucet water include potable water, drinking water, tap water, and municipal water. Other terms that may be used to refer to faucet water in a specific context include groundwater, well water, and rainwater. People may use these synonyms depending on the type of water system they have, the source of their water, or the level of purification in their water supply.