Numbers as words in arbitrary bases

Today’s intermediate challenge on Reddit’s /r/dailyprogrammer intrigued me somewhat, so I decided to take a crack at it. The basic idea is if you are given a number, try converting it to all bases from 2 to 64 (with a special encoding). Print out any of those that are words.

For example, if you interpret the number 44,269 as a base 16 (Hexadecimal) number, you get the word “aced”. So just how many of these words are there out there?