Heartburn and Ill will

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.

Ill will and heartburn are semantically related. In some cases you can use "Ill will" instead a noun "Heartburn".

Ill will noun - The feeling of a hostile person.

Heartburn and ill will are semantically related. Sometimes you can use "Heartburn" instead a noun phrase "Ill will".