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.
Example sentence: Low-cost, high-grade coal, oil and natural gas - the backbone of the Industrial Revolution - will be a distant memory by 2050. Much higher-cost remnants will still be available, but they will not be able to drive our growth, our population and, most critically, our food supply as before.
Ember
Part of speech: noun
Definition: A glowing piece of coal or wood.plural embers: smoldering ash