1) Canadian rapids 2) Ending for somer 3) French word used in English 4) Rapid in a river 5) River waterfall 6) Waterfall Found on https://www.crosswordclues.com/clue/sault
Sault noun [ Old French , French saut , from Latin saltus . See Salt a leap.] A rapid in some rivers; as, the Sault Ste. Marie. [ U.S.] Bartlett. Found on http://www.encyclo.co.uk/webster/S/20