Gastritis and Heartburn

Gastritis noun - Inflammation of the lining of the stomach; nausea and loss of appetite and discomfort after eating.

Heartburn and gastritis are semantically related. In some cases you can use "Heartburn" instead a noun "Gastritis".

Heartburn noun - A painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus); symptomatic of an ulcer or a diaphragmatic hernia or other disorder.

Gastritis and heartburn are semantically related. You can use "Gastritis" instead a noun "Heartburn".