wool vs vicuna

wool and vicuna both are nouns.

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

As nouns, vicuna is a hyponym of wool; that is, vicuna is a word with a more specific, narrower meaning than wool:

wool: fiber sheared from animals (such as sheep) and twisted into yarn for weaving
vicuna: the wool of the vicuna

Other hyponyms of wool include Shetland wool, raw wool, alpaca, cashmere, fleece, shoddy, virgin wool.

wool (noun)	vicuna (noun)
outer coat of especially sheep and yaks	small wild cud-chewing Andean animal similar to the guanaco but smaller; valued for its fleecy undercoat
a fabric made from the hair of sheep	a soft wool fabric made from the fleece of the vicuna
fiber sheared from animals (such as sheep) and twisted into yarn for weaving	the wool of the vicuna