Synonyms of nefarious

1 Syllable

vile, rank, foul, gross, fouls, base

2 Syllables

flagrant, fouled, miscreant, heinous, odious, vilest, evil, monstrous, rotten, corrupt, glaring, putrid, vicious, viler, grody, hellborn, foulest, fouler, wicked, dreadful, ogreish, hellish, fiendish, scurvy

3 Syllables

pernicious, immoral, villainous, criminal, egregious, shameful, diabolic, outrageous, treacherous, depraved, infernal, ill-famed, infamous, flagitious, horrible, atrocious, opprobrious, devilish, miasmatic, flatitious, praetorian, perverse, unlawful

4 Syllables

detestable, unlicensed, demonical, profiteering, iniquitous, indictable, satanical, execrable

5 Syllables

degenerated, under-the-counter, mephistophelian, degenerate, abominable