boiler

A person who boils something.

A steam boiler.

An apparatus for heating circulating water or other heat transferring liquid.

A device consisting of a heat source and a tank for storing hot water, typically for space heating, domestic hot water etc., disregarding the source of heat.

A kitchen vessel for steaming, boiling or heating food.

A sunken reef, especially a coral reef, on which the sea breaks heavily.

A tough old chicken only suitable for cooking by boiling.

(UK, Australia, slang, derogatory) An old woman.