When it comes to describing a fire as being "hot", there are many synonyms you can use to spice up your language. For example, you can describe a fire as being blazing, scorching, burning, or even searing. Other synonyms include fiery, intense, sizzling, and fervent. Other descriptors might include smoking, aglow, flickering or flaring. For a more figurative usage, you can say a fire is passionate, enthusiastic or even zealous. Ultimately, using synonyms to describe a hot fire can add depth and color to your writing, making it more interesting and engaging. Just be sure to choose words that accurately reflect the intensity of the fire in question!