Hexateuch is a term that refers to the first six books of the Hebrew Bible or the Old Testament in Christianity. However, there are other synonyms for this term that are often used. Firstly, the term "Pentateuch" is often used as a substitute for "Hexateuch." This term only includes the first five books of the Hebrew Bible. Secondly, "Torah" is another synonym, which means "law" or "instruction" in Hebrew. This term is important in Jewish tradition, as it is often used to refer to the first five books of the Hebrew Bible. Finally, the term "Books of Moses" can also be used as a synonym for "Hexateuch." This term recognizes the belief that Moses wrote these books.