Letter on position 1 (f) changed: 16 words bats cats eats gats hats kats lats mats nats oats pats qats rats tats vats wats Letter on position 2 (a) changed: 2 words fets fits Letter on position 3 (t) changed: 9 words faas fabs fads fags fahs fans fars faws fays Letter on position 4 (s) changed: 1 word fate