Letter on position 1 (t) changed: 13 words bams cams dams gams hams jams lams mams nams pams rams sams yams Letter on position 2 (a) changed: 3 words tems toms tums Letter on position 3 (m) changed: 16 words tabs tads taes tags tais taks tans taos taps tars tass tats taus tavs taws tays Letter on position 4 (s) changed: 2 words tame tamp