Answer: afraid. afterlife. alarming. alien. angel. apparition. ...
ballerina. bat. beast. bizarre. black. black cat. ...
cackle. cadaver. candy. cape. carve. casket. ...
dark. darkness. dead. death. demon. devil. ...
eerie. elf. enchant. evil. eyeballs. ...
face paint. fairy. fall. fangs. fantasy. ...
genie. ghastly. ghost. ghostly. ghoul. ...
hair-raising. Halloween. hat. haunt. haunted house.
Explanation: they just are