Count Unique Words

Under.zip (Info) "CountUniqueWords" - Display a count of the number of unique words in the current selection or document.
Handy when you are composing an article and want to have some measure of its impact. Unique words often indicate unique ideas. By comparing the ratio of unique to all words, you can have an idea of how well you are tweaking your short article for better impact.
If you select no text, the count will be delivered on the entire document. You can exclude the address and saluation to gather information solely on the body of a letter.
See also "CountWords".