Zend-Avesta is a collection of ancient religious texts that contain the teachings and beliefs of Zoroastrianism. This term can be replaced with several other synonyms as well, such as Avesta, Zoroastrian scriptures, The Holy Book of Zoroastrianism, and Mazdayasna scriptures. The term 'Avesta' is derived from the Pahlavi language, which means 'text' or 'scripture.' The Zend-Avesta is divided into two parts: the first part is the Vendidad, which is also known as the Law Code, and the second part is the Yasna, which consists of hymns and texts. Other synonyms for Zend-Avesta are the Persian religion's sacred texts, the Zoroastrian scriptures, and the Avestan hymns. Overall, these synonyms refer to the religious texts that contain the fundamental beliefs and practices of Zoroastrianism.