Synonyms and related words :
actionable, against the law, anarchic, anarchistic, anomic, black-market, bootleg, chargeable, contraband, contrary to law, criminal, felonious, flawed, illegal, illegitimate, illicit, impermissible, indefensible, inexcusable, inexpiable, irregular, irremissible, justiciable, lawless, nonconstitutional, nonlegal, nonlicit, outlaw, outlawed, punishable, triable, unallowable, unallowed, unauthorized, unconscionable, unconstitutional, under-the-counter, under-the-table, undue, unforgivable, unjustifiable, unlawful, unofficial, unpardonable, unreasonable, unstatutory, unwarranted, wrongful