Crossword solverSynonyms for saint lawrence seaway5 crossword answers for “saint lawrence seaway” (5,8,6), sorted by letter count.How many letters?All56171911011616 letters 1seaway7 letters 1sea lane(3,4)9 letters 1ship route(4,5)10 letters 1trade route(5,5)16 letters 1St. Lawrence Seaway(2,8,6)