book cloth vs fabric

book cloth and fabric both are nouns.

Word	Noun	Adjective	Verb	Adverb
book cloth	Yes	No	No	No
fabric	Yes	No	No	No

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

book cloth: a woven fabric (usually cotton) used for book covers.
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of book cloth include cloth, material, textile.

book cloth (noun)	fabric (noun)
a woven fabric (usually cotton) used for book covers.	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
	the underlying structure