naturalness vs artlessness

naturalness and artlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
naturalness	Yes	No	No	No
artlessness	Yes	No	No	No

As nouns, naturalness and artlessness are synonyms defined as:

Other synonyms of naturalness include ingenuousness, innocence.

naturalness (noun)	artlessness (noun)
the quality of being natural or based on natural principles	ingenuousness by virtue of being free from artful deceit
the likeness of a representation to the thing represented	the quality of innocent naivete
the quality of innocent naivete