The word "racking" can have several synonyms based on its context. One meaning of "racking" is causing extreme physical or emotional pain or strain. Some synonyms for this sense of the word include torturous, excruciating, agonizing, grueling, and draining. Another usage of "racking" can be related to the storage or organization of items. For this sense, synonyms including shelving, stacking, arranging, organizing, and storing can be used. In the context of wine-making, "racking" refers to the process of moving wine from one container to another to clarify it. Some synonyms for this sense of the word include clarifying, filtering, and straining.