Security Service
— Noun
– English
~ the government agency in the United Kingdom that is responsible for internal security and counterintelligence on British territory
Secret Service
— Noun
– English
~ the United States intelligence agency that protects current and former presidents and vice presidents and their immediate families and protects distinguished foreign visitors; detects and apprehends counterfeiters; suppresses forgery of government securities and documents
Selective Service
— Noun
– English
~ an independent federal agency that administers compulsory military service