ambidextrous vs ambidextrousness

ambidextrous is not a noun while ambidextrousness is a noun.

Word	Noun	Adjective	Verb	Adverb
ambidextrous	No	Yes	No	No
ambidextrousness	Yes	No	No	No

ambidextrous (noun)	ambidextrousness (noun)
	the property of being equally skillful with each hand

ambidextrous (adjective)	ambidextrousness (adjective)
equally skillful with each hand
marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another