Synonyms and related words :
actionable, against the law, anarchic, anarchistic, anomic, banned, barred, black-market, bootleg, chargeable, contraband, contrary to law, criminal, felonious, flawed, forbade, forbid, forbidden, illegal, illegitimate, illicit, impermissible, irregular, justiciable, lawless, nonconstitutional, nonlegal, nonlicit, nonpermissible, not permitted, off limits, out of bounds, outlaw, outlawed, prohibited, punishable, ruled out, taboo, tabooed, triable, unallowed, unapproved, unconstitutional, under the ban, under-the-counter, under-the-table, unlawful, unlicensed, unofficial, unpermissible, unsanctioned, unstatutory, untouchable, unwarrantable, unwarranted, verboten, vetoed, wrongful