Calefactory, a word derived from the Latin term "calefacere," which means "to make warm," refers to a place or device that generates heat. Here are some synonyms for the word calefactory: heater, furnace, radiator, boiler, convector, stove, warmer, and hearth. These words describe objects that generate heat through various means, such as electric, gas, or coal. Additionally, the words kiln, oven, and incinerator are also synonymous with calefactory, but they denote a specific type of heat-generating device that is mainly used for baking, smelting, or waste disposal. Regardless of the term used, all these words point to something or someone that can provide warmth and comfort during cold weather.