Letter on position 1 (w) changed: 13 words bark cark dark hark jark kark lark mark nark park rark sark yark Letter on position 2 (a) changed: 1 word work Letter on position 3 (r) changed: 4 words wack walk wank wauk Letter on position 4 (k) changed: 9 words warb ward ware warm warn warp wars wart wary