Coal miners are professionals who extract coal from the earth for energy and industrial purposes. There are several other terms that can be used to describe coal miners, including collier, pitman, and hewer. A collier is a coal miner who specializes in underground coal mining. A pitman is a coal miner who works in an open-pit mine. A hewer is a coal miner who manually extracts coal from a coal seam. Additionally, some other common terms used to describe coal miners include mine workers, miners, and coal diggers. Despite the different terms used to describe coal miners, they all share the same goal of extracting coal to meet the world's energy and industrial needs.