Letter on position 1 (w) changed: 9 words balls calls falls galls halls lalls malls palls talls Letter on position 2 (a) changed: 3 words wells wills wulls Letter on position 3 (l) changed: 3 words wails wauls wawls Letter on position 4 (l) changed: 4 words walds wales walis walks Letter on position 5 (s) changed: 2 words walla wally