strangely diabolical or cruel; monstrous

a ghoulish and questionable sense of humor.

showing fascination with death, disease, maiming, etc.; morbid

ghoulish curiosity.

of, pertaining to, or like a ghoul or ghouls.

adjective

cruel , demonic , devilish , diabolical , eerie , fiendish , frightening , ghastly , grim , grisly , gruesome , horrible , macabre , monstrous , morbid , revolting , spine-chilling , spooky , terrifying , diabolic , hellish , infernal , ogreish , satanic , satanical