Letter on position 1 (p) changed: 11 words buds cuds duds fuds juds luds muds ouds ruds suds wuds Letter on position 2 (u) changed: 3 words pads peds pods Letter on position 3 (d) changed: 9 words pubs pugs puls puns pups purs puss puts puys Letter on position 4 (s) changed: 1 word pudu