Multi Word Morph
Here is a neat little tool that will change one word into another by changing one letter at a time.
Enter a start word and an end word each four letters long and Wordplays will show how the start word can be changed into the end word by changing one letter at a time. Both words must be valid.
Sometimes it can't be done, and sometimes there may be a quicker path from start to end than the one shown. Give it a try, see if you can come up with a shorter path!