The term COIN OLD is composed of six different crossword solutions: LIRA (4 letters), SLOT (4 letters), CENT (4 letters), RIAL (4 letters), SOU (3 letters), and OBOL (4 letters), ECU (3 letters). LIRA is the name of the currency used in Turkey, SLOT is a term for a coin-operated machine, CENT is a unit of currency in the United States, RIAL is the currency of Iran, SOU is a former French coin, OBOL is an ancient Greek coin, and ECU is a former European currency.