you can go to file, print, and then there is an option to save as a PDF. You can do it with anything.
OR you can take the word file, or any file for that matter to www.zamzar.com
and they will convert it for you.
It worked wonders when I wanted to take tests in PDF and put them into word so I can change the numbers and have a practice test and/or replacement test for kids I wanted to test again.