Wiktionary
spookiness
n. The property of being spooky.
Usage examples of "spookiness".
But the folklore had never prepared them for the destructive force it had loosed, the lingering spookiness on the mountain even after the rogue was dead.
In this wooden shelter, which had a reputation for spookiness because someone for some reason had hanged himself from one of its rafters, under a roof which would accordingly have inspired any artist, Amsel stored the materials that would subsequently come to life as scarecrows.