coal vs char

coal and char both are nouns.

Word	Noun	Adjective	Verb	Adverb
coal	Yes	No	Yes	No
char	Yes	No	Yes	No

As verbs, coal and char are synonyms defined as:

coal (noun)	char (noun)
a hot fragment of wood or coal that is left from a fire and is glowing or smoldering	any of several small trout-like fish of the genus Salvelinus
fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period	a human female employed to do housework
	a charred substance

coal (verb)	char (verb)
take in coal	burn slightly and superficially so as to affect color
supply with coal	burn to charcoal
burn to charcoal