Letter on position 1 (b) changed: 8 words dusts fusts gusts justs lusts musts ousts rusts Letter on position 2 (u) changed: 2 words basts bests Letter on position 3 (s) changed: 3 words buats bunts butts Letter on position 4 (t) changed: 2 words buses busks Letter on position 5 (s) changed: 2 words busti busty