Letter on position 1 (w) changed: 10 words bases cases eases gases lases mases oases pases rases vases Letter on position 2 (a) changed: 2 words wises wuses Letter on position 3 (s) changed: 10 words wades wages wakes wales wames wanes wares waves wawes waxes Letter on position 4 (e) changed: 3 words wasms wasps wasts