revolting, disgusting, abhorrent, repellent, repugnant, offensive, objectionable, vile, foul, nasty, loathsome, sickening, nauseating, stomach-churning, stomach-turning, hateful, detestable, execrable, abominable, monstrous, appalling, reprehensible, deplorable, insufferable, intolerable, despicable, contemptible, beyond the pale, unspeakable, noxious, horrendous, heinous, atrocious, awful, terrible, dreadful, frightful, obnoxious, unsavoury, unpleasant, disagreeable, distasteful, dislikeable, off-putting, uninviting, displeasing;

ugly, as ugly as sin, hideous, grotesque, gruesome, unsightly, reptilian;

North American vomitous

informal ghastly, horrible, horrid, God-awful, gross, putrid, sick-making, sick, yucky, icky, fugly

British informal beastly

Northern Irish informal bogging

North American informal skanky

New Zealand informal huckery

literary noisome

archaic disgustful, scurvy, loathly

rare rebarbative