Definition of phantasm :
1. A mental image or representation of a real object; a fancy; a notion.
2. An image formed by the mind, and supposed to be real or material; a shadowy or airy appearance; sometimes, an optical illusion; a phantom; a dream.
vestige, darkness, bogey, shadower, spectre, figment, daydream, revenant, real, dark, mirage, error, shade, fiction, fantasm, reverie, hallucination, bogeyman, fancy, delusion, bogle, fallacy, visitant, spook, ignis fatuus, trace, wraith, tail, fantasy, tincture, supernatural, phantasma, eidolon, dream, haunt, vision
ghost (part of speech: noun)
daemon, werewolf, apparition, bugbear, succubus, horror, monster, Frankenstein, shadow, ghoul, specter, chimera, illusion, Dracula, bogey man, myth, incubus, ogre, phantom, spirit, nightmare, ghost, terror, bugaboo, hobgoblin, vampire
- Experience had bred no fancies in him that could raise the phantasm of appetite. - "Silas Marner The Weaver of Raveloe", George Eliot.
- The crisis came with the attack of the Leopard on the Chesapeake in 1807, after which the possibility of maintaining peace, under such a pressure, appeared, in its true light, as a phantasm. - "The Emancipation of Massachusetts", Brooks Adams.
- Vivid as it seems- all I suffer as I write is but a faint phantasm of what I then endured. - "Wilfrid Cumbermede", George MacDonald.