Catechism classes are religious education classes that teach fundamental beliefs and values of a particular faith. Synonyms for catechism classes include Sunday school, religious instruction, faith formation, spiritual education, religious studies, and religious training. Sunday school is a term commonly used in Christianity, while religious studies and spiritual education are more general terms that can be used for any religion. Faith formation and religious training emphasize the importance of a structured and intentional approach to learning about one's faith. Overall, these synonyms demonstrate the variety of ways that religious education can be expressed in different religious traditions and contexts.