Letter on position 1 (n) changed: 15 words aits bits cits dits fits gits hits kits lits pits rits sits tits wits zits Letter on position 2 (i) changed: 3 words nats nets nuts Letter on position 3 (t) changed: 6 words nibs nids nies nils nims nips Letter on position 4 (s) changed: 1 word nite