pepper-and-salt vs cloth

pepper-and-salt and cloth both are nouns.

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

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

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

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

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