Heatproof is a word that is commonly used in the context of cooking and baking. It refers to materials that are able to withstand high temperatures without melting, warping, or burning. However, there are many synonyms for the word "heatproof" that can be used in this context. Some of these synonyms include fire-resistant, flame-resistant, heat-resilient, heat-resistant, fireproof, fire safeguarded, and high-temperature tolerant. All of these synonyms convey the same meaning as "heatproof" and can be used interchangeably in most situations. When choosing which synonym to use, it is important to consider the context and tone of the sentence, as well as the level of formality required.