nightmarish

extremely disturbing or repellent a photographic exhibit of nightmarish images from the wars of the 20th century Synonyms appalling, atrocious, awful, dreadful, frightful, ghastly, grisly, gruesome (also grewsome), hideous, horrendous, horrid, horrific, horrifying, lurid, macabre, monstrous, nightmare, horrible, shocking, terrible, terrificRelated Words alarming, bloodcurdling, dire, direful, fearful, fearsome, forbidding, formidable, frightening, gut-wrenching, hair-raising, heart-stopping, intimidating, redoubtable, scary, terrifying; abhorrent, deplorable, disagreeable, disgusting, distasteful, loathsome, nauseating, noisome, obnoxious, obscene, offensive, repugnant, repulsive, revolting, sickening; abominable, evil, foul, heinous, noxious, odious, unspeakable, vile; grotesque, ugly, unsightlyNear Antonyms agreeable, appealing, attractive, delectable, delicious, delightful, enjoyable, enticing, inviting, pleasant, pleasing, pleasurable, satisfying, welcome; cheering, comforting, soothing