Chillness can be described in various ways, from coolness to frigidity, or even iciness. Other synonyms include frostiness, coldness, and chilliness, all of which denote a certain level of low temperature or lack of warmth. Additionally, words such as aloofness, detachment, and indifference can be used to represent a chillness or coolness in demeanor or attitude. When it comes to food or beverages, the word refreshing might be used instead of chillness, while in a more informal setting, cool, hip, or laid-back can be fitting replacements. Ultimately, the choice of synonyms for the word chillness depends on the context and desired usage.