Trouble with that is, both words must be the same length. I decided to make it more fun, and increase the range of words you can use, by adding two rules:
At each step, you may:
- Change one letter,
- Add one letter, or
- Remove one letter.
Example: HOT COT COD COLD.
This allows me to change KINKY into TURTLE thus: KINKY KINK MINK MUNK MUSK MUST BUST BUTT BUTTE BUTTER BUTLER BUSTLER BUSTLE HUSTLE HURTLE TURTLE. That's 15 steps. Can anyone find a shorter solution?