coal vs carbon

coal and carbon both are nouns.

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

coal (noun)	carbon (noun)
a hot fragment of wood or coal that is left from a fire and is glowing or smoldering	a copy made with carbon paper
fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period	an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
	a thin paper coated on one side with a dark waxy substance (often containing carbon); used to transfer characters from the original to an under sheet of paper