staple fiber vs natural fiber

staple fiber and natural fiber both are nouns.

Word	Noun	Adjective	Verb	Adverb
staple fiber	Yes	No	No	No
natural fiber	Yes	No	No	No

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

staple fiber: a natural fiber (raw cotton, wool, hemp, flax) that can be twisted to form yarn
natural fiber: fiber derived from plants or animals

Other hypernyms of staple fiber include natural fibre.

staple fiber (noun)	natural fiber (noun)
a natural fiber (raw cotton, wool, hemp, flax) that can be twisted to form yarn	fiber derived from plants or animals