frightful Synonyms

awful horrible atrocious dreadful horrifying alarming terrible fearful gruesome shocking ghastly scary appalling frightening repulsive disgusting terrifying hideous tremendous ugly horrid objectionable menacing monstrous offensive nasty odious nauseating obnoxious ominous repellent repugnant macabre hair-raising bloodcurdling vile unspeakable unpleasant threatening terrific startling sinister sickening rotten revolting unsettling loathsome disquieting displeasing disagreeable