Tiler or Tiller: How To spell?

The word Tiler is misspelled against Tiller, a noun meaning "A lever of wood or metal fitted to the rudder head and used for turning side to side in steering. In small boats hand power is used; in large vessels, the tiller is moved by means of mechanical appliances. See Illust. of Rudder. Cf. 2d Helm, 1."