Lump coal refers to coal that has not been pulverized into small pieces or powder. Other synonyms for lump coal could include raw coal, uncrushed coal, or unprocessed coal. Lump coal is typically used as fuel in industries or homes and is known for its high quality and energy density. Another synonym for lump coal is bituminous coal, which is a type of coal that contains a significant amount of tar-like substances such as bitumen. Anthracite coal is also a synonym for lump coal, and it is known for its high carbon content and low sulfur content, making it a popular fuel source for residential heating.