Discussion Groups / English Usage / January 2007

You can do anthing you want, but that doesn't make it idiomatic.  And
"a naughtiness" to describe a naughty act unidiomatic.[1]
"Naughtiness" is a character trait, not an act.  You'd have to say
something like "naughty act" or "misdeed."

That isn't to say that you can't find examples of "a naugtiness" here
and there.  You can use "a" to precede the word when it means a trait,
as in "There's a naughtiness about her that nothing can overcome."
But, to repeat, "naughtiness" as "misdeed" isn't in current use in
idiomatic English.