That's complicated. The only way to sync your stuff with the Palm calendar is to either use:
1) Palm Desktop software (You'd have to go back and manually enter in all the dates)
2) MS Outlook (again, manually enter in all the dates)
I dunno what kind of calendar you made in MS Word, but I don't think it would be easy to convert a Word document to Outlook dates...
This is what I do:
I use Palm Desktop on my computer and enter in all my appointments, meetings, dates, events, etc. I have all my contacts, To Do's, and memos on that. I then simply keep that in sync with my Palm. It may sound like a pain to enter in all your stuff from MS Word to Palm Desktop (on the computer), but you'll only have to do it once.
I don't know if there's an automatic (read: easy and fast) way to do this.