spectre
spec-tre
noun
A potential danger or unpleasant event that causes widespread fear or worry.
"The spectre of recession worried many businesses."
noun
A terrifying ghost or phantom, often appearing as a visible, disembodied spirit.
"A chilling spectre reportedly haunted the ancient castle's halls."
Thesaurus
Synonyms: apparition, fantasm, phantasma, specter, phantom, phantasm, ghost, shade, spook, wraith