The term MILL SITE refers to a location where a mill is situated. A mill is a building or group of buildings used for manufacturing, processing, or other industrial activities. The two crossword solutions for this term are STREAM (6 letters) and POND (4 letters). A STREAM is a body of water that flows in a channel and is usually smaller than a river. A POND is a small body of still water, typically one that is artificially created. Both streams and ponds are often found near mill sites, providing the necessary water power to run the mill.