Letter on position 1 (t) changed: 10 words buns duns funs guns huns muns nuns puns runs suns Letter on position 2 (u) changed: 4 words tans tens tins tons Letter on position 3 (n) changed: 6 words tubs tugs tuis tums tups tuts Letter on position 4 (s) changed: 5 words tuna tund tune tung tuny