voicelessness vs voiceless

voicelessness is a noun but voiceless is not a noun.

Word	Noun	Adjective	Verb	Adverb
voicelessness	Yes	No	No	No
voiceless	No	Yes	No	No

voicelessness (noun)	voiceless (noun)
having no voice in the management or control of affairs
speaking softly without vibration of the vocal cords
(phonetics, of a consonant) The property of being spoken without vibration of the vocal cords, as [t], [s], or [f].
a disorder of the vocal organs that results in the loss of voice

voicelessness (adjective)	voiceless (adjective)
	deprived of the rights of citizenship especially the right to vote
	produced without vibration of the vocal cords
	being without sound through injury or illness and thus incapable of all but whispered speech
	uttered without voice