See phantasm in Webster's New World Roget's A-Z Thesaurus II
noun
A supernatural being, such as a ghost:
apparition, bogey, bogeyman, bogle, eidolon, ghost, phantasma, phantom, revenant, shade, shadow, specter, spirit, visitant, wraith. (Informal) spook. (Regional) haunt. See beings, supernaturalAn illusory mental image:
daydream, dream, fancy, fantasy, fiction, figment, illusion, phantasma, reverie, vision. See realAn erroneous perception of reality:
delusion, hallucination, ignis fatuus, illusion, mirage, phantasma, will-o'-the-wisp. See real
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