Comparative form of spooky: more spooky(adjective)
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Use "spookier" in a sentence
"The only way this story could be any spookier is if the horse that won the race was named Skinny Brown Moslem."
"Playing that way actually makes the game spookier, which is great, but unfortunately the tutorial level all but orders you to shoot a gun, so by the time you realise this achivement exists you've probably already blown your shot at it."
"Kat thought it would be "spookier" to replace the 100-watt bulb with a 15-watt bulb, so my time was spent staring at small, dim blobs of pink costumes and wondering whether they were supposed to be Tinkerbell, the Pink Panther, or perhaps a ballet outfit."