The antonyms for the word "unpredictabilities" are predictabilities, certainties, and reliable behaviors. Predictabilities refer to things that are expected to happen, maintaining stability and consistency in various situations. Certainties are more stable phenomena in which the outcome can be accurately anticipated. Reliable behaviors indicate that there is a standard practice or procedure that can be followed to reach a specific result. These antonyms contrast with unpredictabilities, which suggest randomness, volatility, or a lack of controllability. By knowing antonyms of unpredictabilities, one can better understand the opposite meanings and contextual uses of these terms.