a black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Compare anthracite , bituminous coal , lignite .

a piece of glowing, charred, or burned wood or other combustible substance.

charcoal ( def. 1 ) .

to burn to coal or charcoal.

to provide with coal.

to take in coal for fuel. ?

heap coals of fire on someone's head

to repay evil with good in order to make one's enemy repent.

rake, haul, drag, call, or take over the coals

to reprimand; scold

They were raked over the coals for turning out slipshod work.

noun

anthracite , ash , bituminous , carbon , char , charcoal , cinder , culm , ember , fuel , scoria , slack , smut , spark , stoke