When it comes to describing heat, "hot as hell" is a commonly used phrase to exaggerate the intensity of the temperature. However, there are plenty of other synonyms that can be used to convey the same idea. Some alternatives include "scorching," "sizzling," "sweltering," "torrid," "boiling," "burning," and "blistering." Each of these words emphasizes the extreme nature of the heat and can help to paint a vivid picture of discomfort. So next time you're looking to describe a particularly hot day, consider using one of these fiery synonyms to spice up your language!