Seepage is a term used to describe the movement of water through soil and other porous materials. DISCHARGE, with nine letters, is the process of releasing water from a reservoir or other body of water. DRAINAGE, with eight letters, is the process of removing excess water from an area. OOZE, with four letters, is a slow and steady flow of liquid. LEAK, with four letters, is an unintended escape of liquid or gas. LEAKAGE, with seven letters, is the act of leaking. Osmosis, with seven letters, is the process of a liquid passing through a semi-permeable membrane.