The Oxford Thesaurus An A-Z Dictionary of Synonyms - lawless adj.

1) anarchic(al) , anarchistic, chaotic, unruly, unregulated: There was a lawless period between the revolution and the establishment of government. 2) illegal, illicit, unlawful, criminal, felonious, larcenous, dishonest, corrupt, venal, Colloq crooked: Holding a demonstration without a permit is a lawless act. 3) villainous, nefarious, wicked, sinful, flagitious, iniquitous, treacherous: He was once a member of a lawless motor-cycle gang.