Erosive is a term used to describe 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. Two words that are related to erosive are CAUSTIC and CORROSIVE. CAUSTIC is defined as something that is capable of burning, corroding, or destroying living tissue, and it has seven letters. CORROSIVE is defined as something that is capable of destroying or eating away by chemical action, and it has nine letters.