The term 'CAUSING WEAR' can be summarized by two crossword solutions: EROSIVE (7 letters) and ERODENT (7 letters). EROSIVE refers to the process of erosion, which is the gradual wearing away of land or other surfaces due to natural forces such as wind, water, and ice. Erodent, on the other hand, is an adjective used to describe something that causes erosion. Both terms are related to the concept of wear, which is the gradual deterioration of a material due to repeated use or exposure to environmental factors.