Letter on position 1 (d) changed: 10 words buns funs guns huns muns nuns puns runs suns tuns Letter on position 2 (u) changed: 4 words dans dens dins dons Letter on position 3 (n) changed: 6 words dubs duds dues dugs duos dups Letter on position 4 (s) changed: 4 words dune dung dunk dunt