susurration vs voicelessness

susurration and voicelessness both are nouns.

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

As nouns, susurration and voicelessness are synonyms defined as:

susurration and voicelessness: speaking softly without vibration of the vocal cords

Other synonyms of susurration include whisper, whispering.

susurration (noun)	voicelessness (noun)
speaking softly without vibration of the vocal cords	having no voice in the management or control of affairs
the indistinct sound of people whispering	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