A family of Microsoft word processing software products for creating web, email, and print documents.
In addition to the status bar count, you will want to examine the small Word Count information dialog found from Review, Proofing, Word Count (e.g. Ctrl+Shift+G). This has a checkbox that toggles the counting of textboxes, footnotes and end notes. I believe that this will affect the count in the status bar. Depending upon restrictions of what is to be counted, this may account for some of the discrepancy.