sable vs sable brush

sable and sable brush both are nouns.

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

As nouns, sable and sable brush are synonyms defined as:

Other synonyms of sable include sable's hair pencil.

sable (noun)	sable brush (noun)
marten of northern Asian forests having luxuriant dark brown fur	an artist's brush made of sable hairs
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)	sable brush (adjective)
of a dark somewhat brownish black