Wetness is a term used to describe the presence of WATER in the atmosphere or on a surface. HUMIDITY, with 8 letters, is the amount of WATER vapor in the air. MOISTURE, also with 8 letters, is the presence of liquid WATER on a surface. DEW, with 3 letters, is the condensation of WATER droplets on surfaces that occurs when the temperature drops below the DEW point. DAMP, with 4 letters, is a slightly wet surface. WATER, with 5 letters, is the liquid form of H2O.