The word "swirlier" is an interesting one, often used to describe a spiral or twisting motion. Some synonyms for this word might include "winding," "curling," "twirling," "whirling," or "gyrating." Each of these words evokes a slightly different sense of movement or motion, from the slow and graceful curves of a winding path to the rapid spinning of a top or a whirligig. Depending on the context, one of these synonyms might be a better choice than another - for example, "twirling" might be used to describe the dance of a ballerina, while "gyrating" might be more appropriate for a wild and chaotic scene.