Algidity is a medical term that refers to a state of extreme coldness or low body temperature. The antonyms of Algidity are warmth, heat, hotness, and high temperature. These words indicate a condition where the body is producing and retaining heat, and the ambient temperature is relatively high. Warmth and heat describe a pleasant sensation of comfort, while hotness and high temperature refer to states of increased body temperature that can cause discomfort, fever, or sweating. Antonyms for Algidity suggest a state of normal body temperature, an environment with moderate warmth, and a sense of wellbeing and vitality.