Lasciviousness is a synonym of lewdness.
As nouns the difference between lewdness and lasciviousness
is that lewdness is the property of being lewd while lasciviousness is the state or characteristic of being lascivious.
lewdness
English
Noun
The property of being lewd.
lasciviousness
English
Noun
(-)
The state or characteristic of being lascivious.