The term 'Beach Eroder' refers to a person or machine that erodes beaches. The two crossword solutions for this term are 'TIDE' (4 letters) and 'Shute' (5 letters). 'TIDE' is the regular rise and fall of the sea level caused by the gravitational pull of the moon and sun. 'Shute' is a steep, sloping channel used to carry water or other materials from one place to another. Together, these two words describe the process of beach erosion, which is the gradual wearing away of beaches due to the action of waves, tides, and currents.