Why this word is great
EIDOLISM — [Noun] The belief in ghosts or phantoms; spiritualism. From Ancient Greek εἴδωλον (eídōlon, "image, apparition, phantom, ghost") + -ism (denoting a belief or practice). Unlike "animism" (which imbues all things with spirit) or "spiritualism" (which seeks dialogue with the departed), eidolism is the passive acknowledgment of presence without demand for proof. It is the chill down the spine in an empty hallway, the flicker of movement in a mirror when no one stands behind you, or the way an old house seems to exhale when the lights go out—not fear, but the weight of something unseen, pressing gently against the fabric of the world.