Heaving is a term used to describe the act of forcefully expelling the contents of the stomach through the mouth. It is often associated with nausea and can be caused by a variety of factors such as food poisoning, motion sickness, or excessive alcohol consumption. The crossword solutions for heaving are RETCHING (8 letters), PUKING (6 letters), DISGORGING (10 letters), and VOMITING (8 letters). All of these terms refer to the same action of forcefully expelling the contents of the stomach through the mouth.