left-handedness vs left-handed

left-handedness is a noun but left-handed is not a noun.

Word	Noun	Adjective	Verb	Adverb
left-handedness	Yes	No	No	No
left-handed	No	Yes	No	No

left-handedness (noun)	left-handed (noun)
preference for using the left hand
the status of being born of a morganatic marriage

left-handedness (adjective)	left-handed (adjective)
	using or intended for the left hand
	ironically ambiguous
	rotating to the left
	lacking physical movement skills, especially with the hands
	(of marriages) of a marriage between one of royal or noble birth and one of lower rank; valid but with the understanding that the rank of the inferior remains unchanged and offspring do not succeed to titles or property of the superior
	(of marriages) illicit or informal