Letter on position 1 (p) changed: 11 words bugs dugs fugs hugs jugs lugs mugs rugs tugs vugs yugs Letter on position 2 (u) changed: 2 words pegs pigs Letter on position 3 (g) changed: 9 words pubs puds puls puns pups purs puss puts puys Letter on position 4 (s) changed: 1 word pugh