Synonyms and related words :
abominable, alarming, awkward, bad, bad-tempered, base, bearish, beautiless, bitchy, bitter, blemished, blotted, cacophonic, cacophonous, cankered, cantankerous, churlish, corrupt, crabbed, crabby, cranky, critical, cross, cross-grained, crotchety, crusty, cussed, dangerous, dangersome, debased, defaced, degenerate, depraved, despicable, detestable, disadvantageous, disagreeable, discomforting, disfigured, disgusting, dislikable, displeasing, disquieting, distasteful, dysphemistic, dysphemized, evil, excitable, execrable, explosive, feisty, filthy, foul, fractious, fraught with danger, ghastly, grotesque, gruesome, hateful, hazardous, heinous, hideous, homely, hostile, huffish, huffy, ill-favored, ill-tempered, immoral, inelegant, irascible, irritable, jeopardous, loathsome, marred, mean, menacing, mephitic, nasty, nauseating, nauseous, noisome, objectionable, obnoxious, odious, offensive, ominous, ornery, parlous, periculous, perilous, perverse, perverted, plain, repellent, repugnant, repulsive, revolting, rotten, serious, short on looks, sickening, snappish, sordid, sour, spiteful, spleeny, splenetic, spoiled, surly, testy, thankless, threatening, troublesome, uglified, ugly as hell, ugly as sin, unaesthetic, unalluring, unappealing, unappetizing, unattractive, unbeautiful, uncomely, uncomfortable, undelectable, undelicious, undesirable, unengaging, unenjoyable, unhandsome, uninviting, unlikable, unlovely, unpalatable, unpleasant, unpleasing, unprepossessing, unpretty, unsavory, unsightly, untasteful, unwelcome, vile, waspish