coat vs wool

coat and wool both are nouns.

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

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

Other hyponyms of coat include fur, fleece.

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

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