Mutabilities are qualities or characteristics of something that can be changed or altered. Antonyms for mutabilities are stability, permanence, and unchangeability. Stability refers to the state of being steady, consistent, and not likely to change or shift. Permanence, on the other hand, denotes the quality of being unchanging or lasting for a long time. Unchangeability implies the quality of being fixed or invariable, incapable of being altered or modified. These antonyms serve as opposites to mutabilities and are used to describe things that are resistant to mutation or change.