Synonyms of bad

1 Syllable

wrong, sad, rough, blah, poor, fer, sour, best, fest, sours, cheap, off, rank, worst, null, gross, good

2 Syllables

harmful, heinous, downer, sourest, damndest, besting, dreadful, stinking, awful, raunchy, curdled, ripping, cast-down, downcast, olid, carious, currish, sinful, evil, lousy, rotten, lawless, putrid, sourer, worse, wronging, boo-boo, maligns, fecal, bummer, wronger, fluffed, wrongest, woeful, nuller, seamy, dudder, cheesy, spoiled, septic, seamier, parlous, rancid, decayed, nocent, frightful, viler, grody, hellborn, faultier, damned, ranker, rankest, hurtful, vilest, booboo, tristful, goner, unfair, world-class, crummy, low-rent, vicious, crappy, junky, cruddy, amiss, faulty, diddly, grungy, icky, slipshod, sourish, steller, beastly, malign, dickens

3 Syllables

recusant, hellacious, fallacious, injurious, invalid, mischievous, toxicant, damaging, rascally, atrocious, synthetic, maligning, feculent, putrescent, strong-smelling, villainous, nidorous, ill-founded, bad-smelling, putrified, unsporting, blackhearted, rubbishy, garbage, damnedest, reasonless, depressed, incorrect, erroneous, jeopardous, depraved, heart-rending, inferior, malefic, injuries, pustular, unmarred, imperfect, appalling, dangerous, demonic, sinister, gangrenous, outstanding, immoral, displeasing, deficient, low-grade, second-class, substandard, purulent, godawful, poisonous, devilish, hundred-proof, out-of-sight, careless, injury, hopeless

4 Syllables

contemptible, lamentable, ill-behaved, deleterious, anarchistic, heavy-hearted, evil-smelling, malodorous, defective, detrimental, deformations, unpeaceful, deformation, unratified, misfigured, prejudicious, ill-omened, inedible, dangersome, melancholic, acherontic, inexpiable, maleficent, mephitical, reprobate, piratical, inauspicious, unpromising, prejudicial, uninviting, low-quality, mutilations, unsanctioned, mutilation, overripe, unrewarding, acetose, out-of-this-world, demoniacal

5 Syllables

disreputable, super-excellent, unconducive, acidulated, disconsolate, putrefactive, unpleasant-tasting, irremediable, unacceptable, unenforceable, unretentive, unwarrantable, mephistophelian, abominable, indefensible, inadequate, superexcellent

6 Syllables

counterproductive, unsatisfactory, dissatisfactory