I assume most people know what word-morph is – you change one letter at a time to go from one word to another. So, here’s (a rather self-serving) one for you: How do you go from ‘croor‘ to ‘crater‘? Obviously, because there is one letter more in the result than in the starting point, you are allowed to add a letter at some point.
I shall also allow you any number of steps you want. I have a nice solution in two steps that I came up with on the bus. I’ll post it in the evening, or in the morning tomorrow. Give it a try, see if you can’t get it.