gruesome
bogeyman
corpse
tomb
demon
blood curdling
Terrifying, causing great horror or fear.
A large stone structure or underground room where someone, especially an important person, is buried.
An imaginary, frightening man that supposedly carries away disobedient naughty children.
Frightening in a disgusting way. Horrible, extremely unpleasant and shocking.
A dead human body.
An evil spirit.