There are several synonyms for the phrase "rotten hands." Some of these include decayed hands, putrid hands, foul hands, and decomposed hands. These phrases all convey a sense of decay and unpleasantness, indicating that the hands are in a state of advanced deterioration. Other synonyms for "rotten hands" might include words like deteriorating hands, corrupted hands, or wasting hands. These phrases all suggest that the hands are in a state of decline, either due to age, disease, or some other factor. Overall, there are many different ways to describe hands that are in a state of decay, each with its own unique connotations and implications.