The term 'Irish Lake' can be broken down into four crossword solutions: ERNE (4 letters), LOUGH (5 letters), Gara (4 letters), and Ramor (5 letters). ERNE is a river in Northern Ireland that flows into the Atlantic Ocean. LOUGH is an Irish word for lake, and there are many loughs throughout Ireland. Gara is a lake in County Mayo, Ireland, and is known for its salmon fishing. Ramor is a lake in County Cavan, Ireland, and is part of the River ERNE system.