The term 'excessively pious' is often used to describe someone who is overly religious or SANCTIMONIOUS. This term is often used to describe someone who is hypocritical in their religious beliefs and practices, as they may appear to be very devout but are actually insincere in their faith. The crossword solution for this term is 'SANCTIMONIOUS, ' which means having or showing a hypocritical concern for piety or morality.