The term 'Code of Silence' refers to a set of unwritten rules that dictate that members of a group or organization should not reveal any information about the group's activities. The crossword solutions for this term are Norris (6 letters), Omerta (6 letters), and REST (4 letters). Norris is a reference to Chuck Norris, an American actor and martial artist who is known for his tough guy persona and his adherence to a code of silence. Omerta is a code of silence that is associated with the Mafia and other organized crime groups. REST is a reference to the idea of keeping silent and not revealing any information.