historical vs historicalness

historical is not a noun while historicalness is a noun.

Word	Noun	Adjective	Verb	Adverb
historical	No	Yes	No	No
historicalness	Yes	No	No	No

historical (noun)	historicalness (noun)
	significance owing to its history
	the state of having in fact existed in the past

historical (adjective)	historicalness (adjective)
used of the study of a phenomenon (especially language) as it changes through time
of or relating to the study of history
belonging to the past; of what is important or famous in the past
having once lived or existed or taken place in the real world as distinct from being legendary