Water finder is a term used to describe people or tools that can detect the presence of water underground. There are several synonyms for "water finder" that can be used in different contexts. "Water diviner" is a traditional term used to describe someone with the ability to locate water sources using divining rods. "Hydrologist" is a scientific term for a professional who studies the movement, quality, and distribution of water in the ground. "Well driller" is another term used to describe experts who dig wells and boreholes to reach underground water sources. Other synonyms include "aquifer locator," "groundwater specialist," and "water seeker," depending on the specific field or context.