Letter on position 1 (n) changed: 13 words bans cans dans eans fans gans kans mans pans sans tans vans wans Letter on position 2 (a) changed: 1 word nuns Letter on position 3 (n) changed: 8 words nabs nads nags nams naos naps nats nays Letter on position 4 (s) changed: 2 words nana nane