Stable, steady, consistent, constant, predictable are some of the antonyms for the word "more fluctuating". When something fluctuates, it means that it changes constantly and unpredictably. Therefore, if something is described as stable or steady, it means that it is not changing much and is predictable. Constant means that something remains the same over time. Predictable means that you can anticipate what is going to happen. Antonyms for more fluctuating can be used to describe situations or things that need to remain constant and predictable, such as financial markets, weather patterns, or even relationships.