"Tartuffism" is a term that refers to religious hypocrisy or insincere religious devotion, derived from the character Tartuffe in Moliere's play. There are several synonyms for the term such as "sanctimoniousness," which refers to making a hypocritical show of righteousness or holy behavior. "Pharisaism" is another word for tartuffism, which describes a hypocritical attitude that pretends to be religiously moral. "Pious fraud" is another way to describe tartuffism, referring to the use of religion to deceive or manipulate people. Other synonyms for tartuffism include "pretense," "deception," and "duplicity," which each point to the insincere nature of the behavior being described.