charcoal gray vs charcoal

charcoal gray and charcoal both are nouns.

Word	Noun	Adjective	Verb	Adverb
charcoal gray	Yes	No	No	No
charcoal	Yes	Yes	Yes	No

As nouns, charcoal gray and charcoal are synonyms defined as:

Other synonyms of charcoal gray include charcoal grey, oxford gray, oxford grey.

charcoal gray (noun)	charcoal (noun)
a very dark grey color	a stick of black carbon material used for drawing
	a drawing made with a stick of black carbon material
	a very dark grey color
	a carbonaceous material obtained by heating wood or other organic matter in the absence of air

charcoal gray (adjective)	charcoal (adjective)
	of a very dark grey

charcoal gray (verb)	charcoal (verb)
	draw, trace, or represent with charcoal