pilosity vs woolliness

pilosity and woolliness both are nouns.

Word	Noun	Adjective	Verb	Adverb
pilosity	Yes	No	No	No
woolliness	Yes	No	No	No

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

Other hyponyms of pilosity include hirsuteness, hirsutism, beardedness.

pilosity (noun)	woolliness (noun)
the quality of having hair	The state of resembling wool, in texture or shape.
	The state of being made of or bearing wool.