sable's hair pencil vs sable brush

sable's hair pencil and sable brush both are nouns.

Word	Noun	Adjective	Verb	Adverb
sable's hair pencil	Yes	No	No	No
sable brush	Yes	No	No	No

As nouns, sable's hair pencil and sable brush are synonyms defined as:

sable's hair pencil and sable brush: an artist's brush made of sable hairs

Other synonyms of sable's hair pencil include sable.

sable's hair pencil (noun)	sable brush (noun)
an artist's brush made of sable hairs	an artist's brush made of sable hairs