Synonyms and related words :
appalling, astounding, awe-inspiring, awesome, awful, blue, cadaverous, corpselike, deadly, deathlike, deathly, deathly pale, dire, direful, dread, dreaded, dreadful, eerie, eldritch, fearsome, fell, fiendish, formidable, frightening, frightful, ghastly, ghostlike, ghostly, ghoulish, gory, grim, grisly, grotesque, gruesome, haggard, hideous, horrendous, horrible, horrid, horrific, horrifying, livid, lurid, morbid, mortuary, pale, redoubtable, schrecklich, shocking, spookish, spooky, terrible, terrific, terrifying, tremendous, uncanny, unearthly, wan, weird