There are many synonyms for the word "more torrential". Some of the most common ones include "heavier", "denser", "drenching", "deluging", "pouring", and "flooding". These words are used to describe rainfall or water flow that is particularly strong and persistent. When using these synonyms, it is important to consider the context in which they are being used, as they may have different connotations or shades of meaning that could alter the overall message of the sentence. For example, "drenching" may imply a sudden and intense burst of rain, while "pouring" may suggest a steady but forceful downpour.