Reducibility is the quality or state of being able to be reduced or decreased. When seeking synonyms for this word, one can consider terms such as "diminishment", which implies the act of making something smaller or less significant. Another synonym is "mitigation", which suggests the action of lessening the severity or impact of something. One can also use "decline", which signifies a gradual decrease in size, intensity, or importance. Additionally, "lowering" is a synonym that conveys the idea of reducing or diminishing a value, level, or amount. Lastly, "alleviation" can be used as a synonym as it implies the process of lessening or relieving a burden, difficulty, or hardship.