wool vs fabric

wool and fabric both are nouns.

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

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

wool: a fabric made from the hair of sheep
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of wool include cloth, material, textile.

wool (noun)	fabric (noun)
outer coat of especially sheep and yaks	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
a fabric made from the hair of sheep	the underlying structure
fiber sheared from animals (such as sheep) and twisted into yarn for weaving