wool vs coat

wool and coat both are nouns.

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

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

Other hypernyms of wool include pelage.

wool (noun)	coat (noun)
outer coat of especially sheep and yaks	growth of hair or wool or fur covering the body of an animal
a fabric made from the hair of sheep	an outer garment that has sleeves and covers the body from shoulder down; worn outdoors
fiber sheared from animals (such as sheep) and twisted into yarn for weaving	a thin layer covering something

wool (verb)	coat (verb)
	cover or provide with a coat
	put a coat on; cover the surface of; furnish with a surface
	form a coat over