Letter on position 1 (b) changed: 10 words cases eases gases lases mases oases pases rases vases wases Letter on position 2 (a) changed: 3 words beses bises buses Letter on position 3 (s) changed: 7 words babes bakes bales banes bares bates bayes Letter on position 4 (e) changed: 3 words basis basks basts Letter on position 5 (s) changed: 2 words based baser