lewdness vs obscenity

lewdness and obscenity both are nouns.

Word	Noun	Adjective	Verb	Adverb
lewdness	Yes	No	No	No
obscenity	Yes	No	No	No

As nouns, lewdness and obscenity are synonyms defined as:

Other synonyms of lewdness include bawdiness, salaciousness, salacity.

lewdness (noun)	obscenity (noun)
the trait of behaving in an obscene manner	an obscene act
	the trait of behaving in an obscene manner
	an offensive or indecent word or phrase