Creasing refers to the act of folding or wrinkling a piece of paper or cloth. However, there are several synonyms for the word creasing that you can use to describe this action. Some of these synonyms include folding, crumpling, rumpling, puckering, pleating, and corrugating. Folding implies bending a material in order to achieve a desired shape, while crumpling refers to pressing or crushing a material into a wrinkled shape. Rumpling and puckering imply small, irregular creases, while pleating implies structured folds. Finally, corrugating refers to creating parallel ridges or furrows in a material. All these synonyms for creasing can be used to add variety and specificity to your written or spoken language.