twill vs fabric

twill and fabric both are nouns.

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

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

twill: a cloth with parallel diagonal lines or ribs
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of twill include cloth, material, textile.

twill (noun)	fabric (noun)
a cloth with parallel diagonal lines or ribs	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
a weave used to produce the effect of parallel diagonal ribs	the underlying structure

twill (verb)	fabric (verb)
weave diagonal lines into (textiles)