How do I restore missing fonts?

[2dogs5cats]

I was working in a file and now several of my font styles are missing. What
might have happened and how can I restore.

 

[TF]

Most likely corrupt or missing default printer driver. See
http://word.mvps.org/FAQs/Formatting/NoFonts.htm



:I was working in a file and now several of my font styles are missing.
What
: might have happened and how can I restore.