Letter on position 1 (p) changed: 16 words bats cats eats fats gats hats kats lats mats nats oats qats rats tats vats wats Letter on position 2 (a) changed: 4 words pets pits pots puts Letter on position 3 (t) changed: 13 words pacs pads pahs pais pals pams pans paps pars pass pavs paws pays Letter on position 4 (s) changed: 4 words pate path patu paty