Letter on position 1 (p) changed: 18 words bill cill dill fill gill hill jill kill lill mill nill rill sill till vill will yill zill Letter on position 2 (i) changed: 4 words pall pell poll pull Letter on position 3 (l) changed: 2 words pial pirl Letter on position 4 (l) changed: 4 words pila pile pili pily