Letter on position 1 (p) changed: 12 words back dack hack jack lack mack rack sack tack wack yack zack Letter on position 2 (a) changed: 4 words peck pick pock puck Letter on position 3 (c) changed: 3 words paik park pawk Letter on position 4 (k) changed: 6 words paca pace paco pacs pact pacy