1) European waterway 2) European river 3) European watercourse 4) Greek river 5) Greek watercourse 6) Greek waterway 7) River in Europe 8) River in Greece 9) Watercourse in Europe 10) Watercourse in Greece 11) Waterway in Greece 12) Waterway in Europe Found on https://www.crosswordclues.com/clue/acheloos