legibility vs sharpness

legibility and sharpness both are nouns.

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

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

Other hypernyms of legibility include distinctness.

legibility (noun)	sharpness (noun)
a quality of writing (print or handwriting) that can be easily read	harshness of manner
distinctness that makes perception easy	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