The thing about MS Word, (MS Office), and MS Works is all about opening files. Where word processor documents are sent and delivered electronically, eg by email, or home or office network, or whatever means of electronic transfer, both the sender and the recipient need to be using the same software ideally.
For example, most businesses use MS Word/Office. They can send and receive .doc documents to each other and externally and open the documents without problem. If anyone receives a word processor document created by software they do not have, eg a Works document or a Corel Word Perfect document, they may not be able to open it.
However, in your case, if you are 'printing' documents and envelopes, fax covers, and so on, and/or sending documents by mail or fax, then the recipient doesn't have any problem reading them.
So in my view you don't need anything else.
Download.com doesn't offer any MS Word products for free, although there are MS Office substitutes like OpenOffice or LibreOffice, but again, it doesn't look like you need those.
Wordpad is installed on all Windows' systems and you should find yours in Start > All programs > Accessories > Wordpad. It is rarely used nowadays but is a useful if primitive word processor. If I need to make quick notes for myself, I use Notepad, also installed on all Windows' systems.