Subzero is a term that refers to freezing temperatures. When we talk about it, often we need to use synonyms to describe it in a different way and avoid repetition. Some synonyms for subzero include icy, frosty, frigid, arctic, wintry, glacial, polar, numbing, brittle, and bone-chilling. These words can be used in various contexts such as weather forecasts, science, and even poetry. Each of these words has its own connotation and can create a specific visual image in the reader's mind. The use of synonyms for subzero allows us to add depth and nuance to our written and spoken language.