Pietists were a group of German Lutheran reformers who emphasized individual faith and religious experience over the formal structures and rituals of the Church. Synonyms for Pietist include "devout," "pious," "religious," "spiritual," and "earnest." These terms all convey a sense of deep commitment to one's faith and a desire to live a life in accordance with religious principles. However, Pietists were also known for their strict moral codes, asceticism, and skepticism of worldly pleasures, which has led to synonyms like "puritanical," "ascetic," and "austere." Ultimately, the term Pietist denotes someone who is deeply committed to their faith and seeks a life of spiritual purity and devotion.