Religious observance is the act of participating in rituals and practices of a faith or belief system. Synonyms for this phrase include religious ceremony, devotion, worship, spiritual practice, religious rite, religious service, sacrament, or ritual observance. Each of these alternative phrases emphasizes a different aspect of religious observance, such as the act of devotion, the importance of worship, or the significance of specific rituals. Overall, these synonyms illustrate the diversity of religious practices around the world and the profound role that faith and spirituality play in the lives of people across cultures and traditions.