sable vs achromatic

sable is a noun but achromatic is not a noun.

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

sable (noun)	achromatic (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

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