Letter on position 1 (b) changed: 4 words caller faller taller waller Letter on position 2 (a) changed: 2 words biller buller Letter on position 3 (l) changed: 3 words bailer batler bawler Letter on position 4 (l) changed: 2 words balder balker Letter on position 6 (r) changed: 2 words balled ballet