The antonyms for the word "smooths down" could be roughen up, mess up, tangle, or scrunch. Roughen up refers to making something less smooth or polished, by adding texture or unevenness. Mess up means to create disorder, chaos or an untidy state. Tangle refers to causing hair or threads to knot together, while scrunch means to squeeze or crumple something into a compact mass. Using antonyms can be a great way of adding variation, contrast, or conflict to your writing. By understanding the opposite of a particular word or concept, you can create a more full and nuanced understanding of what you are trying to convey.