spooky
creepy
eerie
bloodcurdling
spine-chilling
spine-tingling
stomach-churning
hair-raising
bone-chilling
gut-twisting
gory (specifically used for something that is bloody)
horrific
ghastly (used mostly for appearances)
ghoulish (a ghoul, in stories, is an evil spirit that open graves and eats the dead bodies in them. This word can be used disapprovingly for a person who takes a morbid interest in death and disaster.)
gruesome
English Notes 
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