Related Clues:

• Make the hair stand on end
• Give chills
• Say "Boo!" to, say
• Haunted-house figure
• Give a fright
• Hallowe'en Doctor?
• Frighten, as horses
• Cause goose bumps
• Frighten, like a horse
• Suddenly spook
• Give a turn
• Cause to jump
• Spectre
• Surprise with a "Boo!"
• Surprise with starlet