Synonyms and related words :
aberrant, abnormal, abominable, atrocious, criminal, delinquent, derogatory, deviant, discreditable, disgraceful, dishonorable, disreputable, evil, hardly the thing, ignoble, illegal, improper, inappropriate, incorrect, indecorous, infamous, inglorious, not done, not the thing, notorious, off-base, off-color, out-of-line, sacrilegious, scandalous, seamy, shabby, shady, shameful, shameless, shoddy, sinful, sordid, terrible, undue, unfit, unfitting, unlawful, unpraiseworthy, unrespectable, unrighteous, unsavory, unseemly, unsuitable, wicked, wrong, wrongful