You can assign a password that will have to be supplied to open a document.
To do that, click on the Tools pull down in the File SaveAs dialog and then
select the General item and enter the passwork in the Password to open
control. Don't lose/forget the password as otherwise not even you will be
able to open the document.
Word does not have the capability to secure print a document. Once you have
given somebody else access to the document, you have lost control over it.
Secure printing is a feature of many high-end printers, that is accessed via
the Printer Properties dialog, but apart from being able to access that
dialog from Word, it has nothing to do with Word itself.
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Hope this helps.
Please reply to the newsgroup unless you wish to avail yourself of my
services on a paid consulting basis.
Doug Robbins - Word MVP