Indigestion is a common digestive disorder that can cause a variety of symptoms, including abdominal pain, bloating, nausea, and HEARTBURN. The crossword solutions for the term indigestion are GAS (3 letters), ACIDOSIS (8 letters), HEARTBURN (9 letters), and DYSPEPSIA (9 letters). GAS stands for Gastrointestinal Symptoms, which are common symptoms of indigestion. Acidosis is an imbalance in the body's acid-base balance, which can be caused by indigestion. HEARTBURN is a burning sensation in the chest that is often caused by indigestion. DYSPEPSIA is a general term for discomfort or pain in the upper abdomen, which is also a symptom of indigestion.