A cupola furnace is a type of furnace commonly used in foundries for melting iron, steel, and other metals. However, there are other terms that can be used interchangeably with cupola furnace. One such term is the blast furnace, which is a similar structure used for smelting iron using a blast of air. Another term is the reverberatory furnace, which is used for melting and refining non-ferrous metals such as copper, lead, and zinc. A third term is the electric arc furnace, which uses an electric arc to melt the metal and is often used in steel production. Overall, there are various types of furnaces and each one has its own specific purpose and advantages depending on the application.