Water brash is a medical condition characterized by a sudden feeling of excessive saliva production and a sour or bitter taste in the mouth. It is often associated with gastroesophageal reflux disease (GERD) and can be uncomfortable and disruptive. Synonyms for water brash include acid regurgitation, GERD-associated hypersalivation, and acid refluction hypersalivation. Other related terms include acid belching, heartburn, acid indigestion, and dyspepsia. These conditions are often treated with antacid medications and dietary changes to decrease acid reflux symptoms. Understanding the synonyms for water brash and related conditions can help individuals better communicate their symptoms with healthcare providers and seek appropriate treatment.