achromatic vs sable

achromatic is not a noun while sable is a noun.

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

achromatic (noun)	sable (noun)
	marten of northern Asian forests having luxuriant dark brown fur
	a scarf (or trimming) made of sable
	an artist's brush made of sable hairs
	a very dark black
	the expensive dark brown fur of the marten

achromatic (adjective)	sable (adjective)
having no hue	of a dark somewhat brownish black