Coal
Part of speech: verb
Definition: To take in coal; as, the steamer coaled at Southampton. To be converted to charcoal.
Part of speech: noun
Definition: A black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel. A piece of coal used for burning. Note that in British English the first of the following examples would usually be used, whereas in American English the latter would. A type of coal, such as bituminous, anthracite, or lignite, and grades and varieties thereof. A smouldering piece of material.
Charcoal
Part of speech: noun
Definition: Impure carbon obtained by heating wood or other organic matter in the absence of oxygen.A stick of black carbon material used for drawing.A drawing made with charcoal.A very dark gray colour.
Part of speech: adjective
Definition: of a dark gray colour.