Microsoft Word includes a built-in word counter. But it is not always accurate. It does not give you a count of all the words in your document. It doesn't count words in headers or footers, or, importantly, in diagrams made up of text boxes, autoshapes and other Word elements. Only in later versions of Word can you get Word to include footnotes and endnotes in its count. Earlier versions of Word don't count words in footnotes or endnotes.
There is a solution. Apart from using CAT tools to come up with a word count, or word counting applications (they ALL count differently).
Try this little macro
http://www.shaunakelly.com/word/CompleteWordCount/index.html