The term "creature of imagination" refers to something that is not real but is created through the imagination. Synonyms for this term can include "figment of imagination", "conjured creation", "phantasm", "fantasy being", "imaginary friend", "illusionary creature", "dream apparition", and "mythical entity". These words can be used in different contexts, such as literature, art, and even psychology. They are used to describe anything that is a product of the imagination, including fictional characters, imaginary creatures, and even imaginary places. These words can be used to add depth and meaning to any form of creative expression.