unpermissive vs unpermissiveness

unpermissive is not a noun while unpermissiveness is a noun.

Word	Noun	Adjective	Verb	Adverb
unpermissive	No	Yes	No	No
unpermissiveness	Yes	No	No	No

unpermissive (noun)	unpermissiveness (noun)
	a lack of permissiveness or indulgence and a tendency to confine behavior within certain specified limits

unpermissive (adjective)	unpermissiveness (adjective)
not inclined to grant permission; severe in discipline