Traditional Islam is also known as classical Islam, which refers to the early Islamic period and the religious practices and beliefs followed during that time. Various synonyms can be used for the term traditional Islam, including orthodox Islam, Sunni Islam, and mainstream Islam. Orthodoxy means adhering to the established faith, and traditional Islam follows the strict interpretations of the Quran and Hadith. Sunni Islam primarily refers to the mainstream tradition that follows the teachings of Prophet Muhammad. Mainstream Islam is the predominant form of the religion followed by the majority of Muslims worldwide, incorporating practices and customs that have been passed down through generations. These synonyms are often used interchangeably to denote the fundamental beliefs and practices of Islam.