Letter on position 1 (g) changed: 10 words buns duns funs huns muns nuns puns runs suns tuns Letter on position 2 (u) changed: 4 words gans gens gins gons Letter on position 3 (n) changed: 9 words gubs gues guls gums gups gurs guts guvs guys Letter on position 4 (s) changed: 2 words gung gunk