expansive vs expansiveness

expansive is not a noun while expansiveness is a noun.

Word	Noun	Adjective	Verb	Adverb
expansive	No	Yes	No	No
expansiveness	Yes	No	No	No

expansive (noun)	expansiveness (noun)
	a friendly open trait of a talkative person
	a quality characterized by magnificence of scale or the tendency to expand

expansive (adjective)	expansiveness (adjective)
able or tending to expand or characterized by expansion
friendly and open and willing to talk
marked by exaggerated feelings of euphoria and delusions of grandeur
of behavior that is impressive and ambitious in scale or scope