In a word meld, you are given one word to try to change into another, one step at a time. Each step consists of changing one letter of the word into another while still having a common* English word. For example, one step would be to change the word "PIE" to "PIT." Another step could change "PIT" to "POT," and so on.

What is the fewest number of steps in which you can change "BUZZ" into "WORD"?

B U Z Z
. . . .
. . . .
W O R D

* "Common" words are to be determined at the discretion of the author