discernability vs sharpness

discernability and sharpness both are nouns.

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

As nouns, sharpness is a hypernym of discernability; that is, sharpness is a word with a broader meaning than discernability:

Other hypernyms of discernability include distinctness.

discernability (noun)	sharpness (noun)
distinctness that makes perception easy	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