Tannings refer to the process of making animal hides into leather by treating them with tannins. However, there are several antonyms for the word tanning that denote the opposite of this process. These antonyms include bleaching, whitening, washing, rinsing, and removing stains. While tanning involves darkening and preserving the natural color of animal hides, these antonyms involve removing or lightening the color. Apart from this, some other antonyms for tanning may also include words like discoloring, fading, and degrading. All these words indicate different processes that do not involve treating animal hides with tannins.