Sundel bolong is a ghost character from Javanese folklore, known for having a hole in the middle of her back. While there may not be exact synonyms for this unique term, there are similar ghostly creatures found in other cultures. In Thai folklore, there is the "phi krahang," a female ghost who wears a traditional Thai dress and carries a basket. In Malaysian folklore, there is the "pontianak," a female vampire who appears as a beautiful woman and preys on men. In Japanese folklore, there is the "yuki-onna," a ghostly woman who appears during snowstorms and can freeze people with her breath. While these are not direct synonyms for "sundel bolong," they do share elements of mystery and the supernatural.