The term "peak-forming" refers to something that is capable of creating a peak or peak-like shape. Some synonyms for this include cresting, surging, rising, peaking, and culminating. These words denote the ability to reach a high point or climax, often indicating great intensity or power. Other synonyms for peak-forming include soaring, ascending, building, and escalating. Each of these words can be used to describe a gradual or sudden increase in intensity or power, resulting in a peak of some sort. Overall, these synonyms are useful for writers and speakers seeking to convey a sense of growth, progress, and intensity in their work.