naive vs naiveness

naive is not a noun while naiveness is a noun.

Word	Noun	Adjective	Verb	Adverb
naive	No	Yes	No	No
naiveness	Yes	No	No	No

naive (noun)	naiveness (noun)
	lack of sophistication or worldliness

naive (adjective)	naiveness (adjective)
marked by or showing unaffected simplicity and lack of guile or worldly experience
not initiated; deficient in relevant experience
inexperienced
lacking information or instruction
of or created by one without formal training; simple or naive in style