Словарь синонимов английского языка - stand-by

(n) 1. supporter, defender, backer, upholder, partisan, sympathizer, adherent, stalwart: His mother had always been his stand-by against the severity of his father. 2. substitute, surrogade, replacement, backup, understudy, second, US and Canadian alternate: They had a second ambulance as a stand-by in case the first broke down or needed servicing. 3. resource, support, replacement: I knew I could always count on you as a stand-by in case I had trouble.