Synonyms and related words :
appalling, astounding, atrocious, awe-inspiring, awesome, awful, baneful, beastly, dire, direful, dread, dreaded, dreadful, fell, formidable, ghastly, ghoulish, grim, grisly, gruesome, hideous, horrendous, horrible, horrid, horrific, lurid, macabre, morbid, redoubtable, rotten, schrecklich, shocking, terrible, terrific, terrifying, tragic, tremendous, unspeakable