The term ADDS MOISTURE TO can be solved by two crossword solutions, HYDRATES (8 letters) and WETS (4 letters). Hydrates means to supply with water or other liquid, while wet means to cause to become or to remain wet. Both terms refer to the process of adding moisture to something, which is a common practice in many industries. For example, in agriculture, farmers often add moisture to their crops to ensure they are healthy and productive. In construction, builders may add moisture to concrete to help it set properly. In general, adding moisture to something helps to keep it healthy and functioning properly.