Synonyms and related words :
apparition, brainchild, bubble, chimera, delirium, eidolon, fancy, fantasque, fantasy, fiction, figment, hallucination, idle fancy, illusion, imagery, imagination, imagining, insubstantial image, invention, maggot, make-believe, myth, phantasm, phantom, romance, sick fancy, thick-coming fancies, trip, vapor, vision, whim, whimsy, wildest dreams