sailcloth vs fabric

sailcloth and fabric both are nouns.

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

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

sailcloth: a strong fabric (such as cotton canvas) used for making sails and tents
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of sailcloth include cloth, material, textile.

sailcloth (noun)	fabric (noun)
a strong fabric (such as cotton canvas) used for making sails and tents	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
	the underlying structure