coal

nouns

fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
coal
is a type of (narrower)
fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
fossil fuel
is a type of (narrower)
matter produced by plants or growing in the manner of a plant
vegetable matter
a hot fragment of wood or coal that is left from a fire and is glowing or smoldering
coal, ember

verbs

burn to charcoal
"Without a drenching rain, the forest fire will char everything"
char, coal
supply with coal
coal
is a type of (narrower)
give something useful or necessary to
"We provided the room with an electrical heater"
furnish, provide, render, supply
take in coal
"The big ship coaled"
coal
is a type of (narrower)
fold up
"take in the sails"
gather in, take in