List of nefarious synonyms and nefarious related words.
abject, abominable, arrant, atrocious, awful, bad, base, beastly, beggarly, beneath contempt, black, blamable, blameworthy, brutal, cheesy, contemptible, corrupt, criminal, crummy, damnable, dark, debased, degenerate, degraded, deplorable, depraved, despicable, detestable, dire, dirty, disgraceful, disgusting, dreadful, egregious, enormous, evil, execrable, fetid, filthy, flagitious, flagrant, foul, fulsome, glaring, grave, grievous, gross, hateful, heinous, horrible, horrid, improper, infamous, iniquitous, knavish, lamentable, little, loathsome, lousy, low, low-down, lumpen, mangy, mean, measly, miscreant, miserable, monstrous, nasty, naughty, noisome, notorious, obnoxious, odious, offensive, outrageous, paltry, peccant, perverse, petty, pitiable, pitiful, poky, poor, putrid, rank, regrettable, reprehensible, reprobate, reptilian, repulsive, rotten, sad, scabby, scandalous, schlock, scrubby, scruffy, scummy, scurvy, shabby, shameful, shocking, shoddy, sinful, small, sordid, squalid, terrible, too bad, unclean, unforgivable, unmentionable, unpardonable, unspeakable, unworthy, vicious, vile, villainous, wicked, woeful, worst, worthless, wretched, wrong