Definition of repellent causing disgust or distaste. synonyms: revolting, repulsive, disgusting, repugnant, sickening, nauseating, stomach-turning, stomach-churning, nauseous, emetic, vile, nasty, foul, appalling, abominable, hideous, horrible, awful, dreadful, terrible, obnoxious, loathsome, offensive, objectionable, off-putting, distasteful, disagreeable, uninviting; abhorrent, despicable, reprehensible, contemptible, odious, heinous, obscene, hateful, execrable; gruesome, grisly; vomitous; informalsick-making, ghastly, putrid, horrid, God-awful, gross, gut-churning, yucky, icky, cringe-making; informalbeastly; literarynoisome; archaicdisgustful, loathly; rarerebarbative antonyms: delightful, lovely noun