Synonyms are words that have similar meanings to the original word. For the term "Sumerian religion," some possible synonyms could be "Mesopotamian worship," "Babylonian spirituality," or "Assyrian faith." These terms relate to the ancient civilizations that existed in the same region during the same time as the Sumerians. Other possible synonyms could include "polytheistic beliefs," "pagan mythology," or "ancient cults." These terms may reflect the focus on multiple gods and goddesses, as well as the use of rituals and ceremonies in the practice of religion during the Sumerian period.