sable vs rigger brush

sable and rigger brush both are nouns.

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

As nouns, rigger brush is a hyponym of sable; that is, rigger brush is a word with a more specific, narrower meaning than sable:

Other hyponyms of sable include rigger.

sable (noun)	rigger brush (noun)
marten of northern Asian forests having luxuriant dark brown fur	a long slender pointed sable brush used by artists
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)	rigger brush (adjective)
of a dark somewhat brownish black