Frostier is a term used to describe the cold and icy weather conditions that we experience during winters. However, sometimes we may want to use another word to describe such frigid temperatures. Fortunately, the English language is full of synonyms that you can use in place of frostier. Some of the common alternatives include icy, chilly, arctic, biting, bitter, frigid, freezing, glacial, gelid, and nipping. Whether you're talking about the weather or something else that's cold and uninviting, it's always a good idea to have a range of synonyms at your disposal. This can help you to keep your language interesting and varied, making your writing or speech more engaging and memorable.