achromatic vs charcoal

achromatic is not a noun while charcoal is a noun.

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

achromatic (noun)	charcoal (noun)
	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

achromatic (adjective)	charcoal (adjective)
having no hue	of a very dark grey

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