Letter on position 1 (p) changed: 10 words buns duns funs guns huns muns nuns runs suns tuns Letter on position 2 (u) changed: 4 words pans pens pins pons Letter on position 3 (n) changed: 9 words pubs puds pugs puls pups purs puss puts puys Letter on position 4 (s) changed: 5 words puna pung punk punt puny