hopsack vs fabric

hopsack and fabric both are nouns.

Word	Noun	Adjective	Verb	Adverb
hopsack	Yes	No	No	No
fabric	Yes	No	No	No

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

hopsack: a loosely woven coarse fabric of cotton or linen; used in clothing
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of hopsack include cloth, material, textile.

hopsack (noun)	fabric (noun)
a loosely woven coarse fabric of cotton or linen; used in clothing	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
	the underlying structure