The term variabilities refers to the degree of variation or fluctuation in something. The antonyms of the word variabilities are uniformity, consistency, stability, and predictability. Uniformity refers to the state of being the same throughout, with no variation or difference. Consistency is the quality of being the same in value, size, or composition. Stability is the state of being fixed, steady, and unchanging. Predictability describes the ability to forecast or anticipate what will happen, based on established patterns or rules. These antonyms represent the opposite of variabilities and can be used to describe systems or situations where there is little to no fluctuation or change.