Crossword clues for River flowing into the Rhine. 4 letters:MAINRiver flowing into the Rhine.AARERiver flowing into the RhineRUHRGerman river flowing into the RhineAARERiver flowing to the RhineAARESwiss river that flows into the RhineRUHRGerman river that flows into the RhineMOSELLEFrench river flowing into Rhine.AARRiver that flows into Rhine.AARRiver flowing into the RhineAARSwiss river that flows into the Rhine (Var.)AARSwiss river that flows into the Rhine