The term "the weird sisters" is commonly used in literature and mythology to describe a group of mysterious and supernatural women. However, there are several synonyms that can also be used to describe these characters. One of the most common is "the three fates", which refers to mythical beings who controlled the threads of life, determining the fate of every mortal. Another popular synonym is "the three witches", which is often used to describe the trio of witches in Shakespeare's play Macbeth. Other synonyms include "the Norns" in Norse mythology, "the Moirai" in Greek mythology, and "the Parcae" in Roman mythology. Regardless of the synonym used, these characters are always portrayed as powerful and enigmatic figures.