Mononoke is a term used in Japanese folklore to refer to supernatural entities or beings that do not belong to any particular category. Synonyms for the word "mononoke" include "yōkai", which are supernatural creatures found in Japanese mythology and folklore; "bakemono", which are ghostly or demonic monsters; and "tsukumogami", which are inanimate objects that have been possessed by spirits. Other similar terms include "obake", "kaii", and "mamono". These words often feature prominently in Japanese literature, art, and popular culture, and continue to fascinate audiences both within and outside Japan.