The term "sharp freezes" refers to a sudden and intense drop in temperature that can cause discomfort and even pose a danger to individuals who are exposed to it for prolonged periods. Some possible synonyms for this concept could include "deep freeze," "subzero conditions," "bitter cold," "bone-chilling," and "arctic blast." These terms can all convey the sense of extreme cold and the unpleasant sensations that come with it, such as numbness, shivering, and frostbite. Depending on the context, other related words and phrases could also be used to describe the effect that sharp freezes can have on people, animals, and the environment.