challis vs fabric

challis and fabric both are nouns.

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

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

challis: a soft lightweight fabric (usually printed)
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of challis include cloth, material, textile.

challis (noun)	fabric (noun)
a soft lightweight fabric (usually printed)	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
	the underlying structure