The adjective 'more decrescent' implies a gradual decline or decrease in something, such as size, quantity, or intensity. Its antonyms would be words that connote an increase, growth, or rise. Some possible antonyms for 'more decrescent' include expanding, increasing, augmenting, growing, escalating, intensifying, burgeoning, thriving, flourishing, and prospering. These words depict something that is on the rise, improving, or thriving, and therefore, they present an opposite meaning to the diminishing quality of 'more decrescent.' The choice of antonym depends on the context and the type of thing that is undergoing a change, whether it is a physical object, an emotion, or an abstract concept.