nefarious
I
adjective
abominable, arrant, bad, base, confounded, contemptible, corrupt, criminal, degenerate, deplorable, depraved, despicable, detestable, devilish, diabolical, discreditable, disgraceful, dishonorable, dissolute, dreadful, evil, execrable, felonious, flagitious, flagrant, foul, gross, hateful, heinous, horrible, ignoble, immoral, impious, improper, indecent, infamous, infernal, iniquitous, malignant, miscreant, monstrous, nefarius, obnoxious, odious, outrageous, peccant, pernicious, profligate, reprehensible, reprobate, scandalous, shameful, sinful, sinister, terrible, treacherous, unrighteous, vile, villainous, wicked, wrong
II
index
bad (offensive), blameful, blameworthy, contemptible, contemptuous, delinquent (guilty of a misdeed), diabolic, dishonest, disreputable, felonious, flagrant, heinous, immoral, inexpiable, iniquitous, irregular (improper), malignant, objectionable, obnoxious, outrageous, peccant (culpable), profligate (corrupt), reprehensible, reprobate, scandalous, sinister
Burton's Legal Thesaurus.
William C. Burton.
2006