Letter on position 1 (r) changed: 16 words bats cats eats fats gats hats kats lats mats nats oats pats qats tats vats wats Letter on position 2 (a) changed: 4 words rets rits rots ruts Letter on position 3 (t) changed: 8 words rads rags rahs rais rams raps raws rays Letter on position 4 (s) changed: 5 words rata rate rath rato ratu