The word "conjuries" refers to the performance of magic or the act of summoning supernatural powers. Its antonyms would, therefore, be words that describe its opposite meaning, such as mundane, ordinary or plain. Other antonyms include disbelieve, doubt or mistrust, as these are all words that suggest a lack of faith in the supernatural. Words like skepticism, cynicism or incredulity could also be used to describe antonyms, as they suggest a disregard for anything outside the realm of science and logic. Ultimately, the antonyms for "congeries" will depend on one's worldview and perspective on the existence of the supernatural.