raffia vs plant fiber

raffia and plant fiber both are nouns.

Word	Noun	Adjective	Verb	Adverb
raffia	Yes	No	No	No
plant fiber	Yes	No	No	No

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

raffia: leaf fibers of the raffia palm tree; used to make baskets and mats etc.
plant fiber: fiber derived from plants

Other hypernyms of raffia include plant fibre.

raffia (noun)	plant fiber (noun)
fiber of a raffia palm used as light cordage and in making hats and baskets	fiber derived from plants
leaf fibers of the raffia palm tree; used to make baskets and mats etc.