Letter on position 1 (s) changed: 13 words bars cars ears fars gars jars lars mars oars pars tars vars wars Letter on position 2 (a) changed: 2 words sers sirs Letter on position 3 (r) changed: 13 words sabs sacs sads sags sais sals sams sans saps sass savs saws says Letter on position 4 (s) changed: 3 words sard sari sark