historicalness vs historical

historicalness is a noun but historical is not a noun.

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

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

historicalness (adjective)	historical (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