distinct vs distinctness

distinct is not a noun while distinctness is a noun.

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

distinct (noun)	distinctness (noun)
	the quality of being sharp and clear
	the quality of being not alike; being distinct or different from that otherwise experienced or known
	the state of being several and distinct

distinct (adjective)	distinctness (adjective)
easy to perceive; especially clearly outlined
clearly or sharply defined to the mind
recognizable; marked
(often followed by `from') not alike; different in nature or quality
constituting a separate entity or part