muslin vs fabric

muslin and fabric both are nouns.

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

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

muslin: plain-woven cotton fabric
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of muslin include cloth, material, textile.

muslin (noun)	fabric (noun)
plain-woven cotton fabric	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
	the underlying structure