Difference between Sanctimony and Sanctimoniousness

What is the difference between Sanctimony and Sanctimoniousness?

Sanctimony as a noun is a hypocritical form of excessive piety, considered to be an affectation merely for public show. while Sanctimoniousness as a noun is the property of being sanctimonious.

We hope you now know whether to use Sanctimony or Sanctimoniousness in your sentence.