No, Windows XP Professional will not come along with Microsoft Word.
MS Word is a application included with MS Office
As I know, Dell Computer would be shipped with a trial version of Office.
However, you can download a trial version of MS Office 2003 here :
http://www.microsoft.com/office/editions/prodinfo/standardtrial.mspx
After you use it for 60 days you need to buy a full version product key and covert this trial version to full version.
For steps to convert trial version to full version
http://www.microsoft.com/office/trial/convert.mspx
For other versions of MS Office :
http://office.microsoft.com/en-us/downloads/default.aspx