asperity vs sharpness

asperity and sharpness both are nouns.

Word	Noun	Adjective	Verb	Adverb
asperity	Yes	No	No	No
sharpness	Yes	No	No	No

As nouns, asperity and sharpness are synonyms defined as:

asperity (noun)	sharpness (noun)
something hard to endure	harshness of manner
harshness of manner	thinness of edge or fineness of point
	a strong odor or taste property
	the quality of being sharp and clear
	the attribute of urgency in tone of voice
	the quality of being keenly and painfully felt
	a quick and penetrating intelligence