Kettle
Part of speech: verb
Definition: To contain demonstrators in a confined area.
Part of speech: noun
Definition: A vessel for boiling a liquid or cooking food, usually metal and equipped with a lid. The quantity held by a kettle. A vessel for boiling water for tea; a teakettle. A pothole. The collective noun for a group of airborne hawks. A steam locomotive A kettledrum. A kettle hole.
Example sentence: You just don't know when you get in the editing room what you will need as a link or a tool for a transition. If you're in a room, and there's a kettle boiling, get a shot of it. Don't worry if people think you're nuts.
Boiler
Part of speech: noun
Definition: An apparatus that generates heat (usually by burning fuel) and uses it to heat circulating water (or sometimes another liquid) in a closed system that is then used for space heating, swimming pool heating, or domestic hot water or industrial processes.Less commonly, a hot water heater.(approximate definition) A fuel burning apparatus in which water is boiled to produce steam for space heating, power generation, or industrial processes. (more precisely) An apparatus in which a heat source other than a hot liquid or steam (most commonly burning fuel, exhaust gas from an internal combustion engine or gas turbine, waste heat from a process, solar energy or electricity) is used to boil water (or rarely another liquid), under pressure to provide steam (or other gas) for use as a heat source in calorifiers, heat exchangers or heat emitters, or for use directly for humidification, in an industrial process, or to power steam turbines.a kitchen vessel for steaming or boiling food