Erosion is the process of gradual destruction or disintegration of a material, such as soil or rock, caused by natural forces like wind, water, and ice. FRICTION, with 8 letters, is the force that resists the relative motion of two surfaces in contact. CORROSION, with 9 letters, is the chemical or electrochemical reaction between a material and its environment that results in the deterioration of the material. RUBBING, with 7 letters, is the action of one surface or object moving repeatedly over another. ABRASION, with 8 letters, is the wearing away of a surface due to FRICTION. DECREASE, with 8 letters, is the act or process of becoming smaller or fewer in size, amount, degree, or intensity. Loss, with 4 letters, is the fact or process of losing something or someone. WEAR, with 4 letters, is the gradual destruction or diminution of something. Washingaway, with 11 letters, is the process of erosion caused by the action of water.