Whizz-Bang - A Fun English-Related Word Game

This is one of my favorite e-mail games. It's called Whizz-Bang (as you can see), and this is how you play.
First you start off with a word; say, "bank", for example. On each turn, you can make ONE alteration. You can swap a letter (ex. make "sank"), drop a letter (ex. make "ban"), trade letter places/ move a letter (ex. make "pot" from "top", or "stank" from "tanks"), or add a letter (ex. make "blank").

In the case where there is absolutely NO valid word in the universe (i.e. not one you just made up, solely for the sake of being a doofus) left to use, start over with another good word. Please, just don't go and do that randomly when you can still make words. If you really want to keep it up, use a dictionary or Google or something (bad punctuation/grammar, I noticed). Oh, and of course, use your judgement in the words you use/make. Let's keep it appropriate, please.

Thanks, and have fun!