Letter on position 1 (c) changed: 13 words bark dark hark jark kark lark mark nark park rark sark wark yark Letter on position 2 (a) changed: 1 word cork Letter on position 3 (r) changed: 4 words calk cask cauk cawk Letter on position 4 (k) changed: 9 words carb card care carl carn carp carr cars cart