clearness vs sharpness

clearness and sharpness both are nouns.

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

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

clearness (noun)	sharpness (noun)
free from obscurity and easy to understand; the comprehensibility of clear expression	harshness of manner
the quality of clear water	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