Synonyms of ugly

1 Syllable

foul, dour, plain, gross

2 Syllables

monstrous, crone, ill-made, roiled, surly, cranky, squalid, dourer, awful, waspy, grousing, peevish, evil, broody, shocking, plaguy, boorish, crankier, crankiest, sullen, horrid, parlous, pesky, frightful, viler, baser, grisly, toucher, vilest, basest, churlish, surlier, hideous, loury, beastly

3 Syllables

loathsome, gruesome, humpbacked, hunchbacked, repelling, unseemly, sobering, revolting, homely, forbidding, grotesque, subfuscous, unbeauteous, vexatious, threatening, animal, jeopardous, appalling, impendent, liverish, off-putting, dangerous, deformed, offputting, lowery, bad-looking, misshapen, repugnant, morose, unsightly, hardnosed, fulminant

4 Syllables

disagreeable, unshapely, uncomely, troublesome, unamusing, percussive, repulsive, unappealing, dangersome, out-of-order, inurbane, explosive, perversive, tenebrific, minatory, disfigured, unaesthetic, infestive, unlovely, hard-featured, ill-favored, unbeautiful, uninviting, eruptive

5 Syllables

unhospitable, misproportioned, comminatory, unprepossessing, detonative