Boiling is a term used to describe the process of bringing a liquid to its boiling point, where it bubbles and releases steam. There are several synonyms for the word boiling, which can be used to convey a similar meaning. Some of the synonyms include simmering, steaming, sizzling, seething, bubbling, and roiling. Simmering is used when the liquid is heated just below its boiling point, while steaming is used when there is significant steam coming out of the liquid. Bubbling and seething can be used interchangeably to describe the agitated movement of the liquid, while sizzling is commonly used to describe the sound of frying food. Roiling is used to describe a rapid and turbulent boiling or boiling water that has been disturbed.