pepper-and-salt vs fabric

pepper-and-salt and fabric both are nouns.

Word	Noun	Adjective	Verb	Adverb
pepper-and-salt	Yes	No	No	No
fabric	Yes	No	No	No

As nouns, fabric is a hypernym of pepper-and-salt; that is, fabric is a word with a broader meaning than pepper-and-salt:

pepper-and-salt: a fabric woven with flecks of light and dark
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of pepper-and-salt include cloth, material, textile.

pepper-and-salt (noun)	fabric (noun)
a fabric woven with flecks of light and dark	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
	the underlying structure