Letter on position 1 (n) changed: 15 words baps caps daps gaps haps japs laps maps paps raps saps taps waps yaps zaps Letter on position 2 (a) changed: 2 words neps nips Letter on position 3 (p) changed: 8 words nabs nads nags nams nans naos nats nays Letter on position 4 (s) changed: 2 words napa nape