Does XP Pro contain ms word?

XP Pro is your operating system.  It does not come with Word.  Word comes with 1) Office Works; 2) Office Small Business Edition; 2) Office Standard; 3) Office Pro.   There may be more, but the answer is that Word comes with Office.

It may have contained a trial version that is good for a specified period of time, but not a full versionunless you ordered it.  Only you and Dell would know that.