If you tend to misspell "goulishness", fret not, as there are several possible correct alternatives. One option is "ghoulishness", which properly captures the eerie and macabre essence. Another suggestion is "goolishness", a playful twist that exudes a mischievous and spooky aura. Finally, "ghouliness" could also be a suitable substitute, adding a touch of supernatural vibes to your writing.