wool vs animal fiber

wool and animal fiber both are nouns.

Word	Noun	Adjective	Verb	Adverb
wool	Yes	No	No	No
animal fiber	Yes	No	No	No

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

wool: fiber sheared from animals (such as sheep) and twisted into yarn for weaving
animal fiber: fiber derived from animals

Other hypernyms of wool include animal fibre.

wool (noun)	animal fiber (noun)
outer coat of especially sheep and yaks	fiber derived from animals
a fabric made from the hair of sheep
fiber sheared from animals (such as sheep) and twisted into yarn for weaving