piece of cloth vs piece of material

piece of cloth and piece of material both are nouns.

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

As nouns, piece of cloth and piece of material are synonyms defined as:

piece of cloth and piece of material: a separate part consisting of fabric

piece of cloth (noun)	piece of material (noun)
a separate part consisting of fabric	a separate part consisting of fabric