Letter on position 1 (p) changed: 9 words balls calls falls galls halls lalls malls talls walls Letter on position 2 (a) changed: 4 words pells pills polls pulls Letter on position 3 (l) changed: 4 words paals pails pauls pawls Letter on position 4 (l) changed: 4 words palas pales palms palps Letter on position 5 (s) changed: 2 words palla pally