piece of cloth vs cloth

piece of cloth and cloth both are nouns.

Word	Noun	Adjective	Verb	Adverb
piece of cloth	Yes	No	No	No
cloth	Yes	No	No	No

As nouns, cloth is a hypernym of piece of cloth; that is, cloth is a word with a broader meaning than piece of cloth:

piece of cloth: a separate part consisting of fabric
cloth: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of piece of cloth include fabric, material, textile, piece.

piece of cloth (noun)	cloth (noun)
a separate part consisting of fabric	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers