distinctness vs clearness

distinctness and clearness both are nouns.

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

As nouns, clearness is a hypernym of distinctness; that is, clearness is a word with a broader meaning than distinctness:

Other hypernyms of distinctness include clarity, uncloudedness.

distinctness (noun)	clearness (noun)
the quality of being sharp and clear	free from obscurity and easy to understand; the comprehensibility of clear expression
the quality of being not alike; being distinct or different from that otherwise experienced or known	the quality of clear water
the state of being several and distinct