Dead easy
This is for Word 2k, I'm sure it works on 2k+3 and 2k+7:
- CTRL-F to open the Find/Replace box
- Click the Replace tab
- Click More to expand the list of options
- Click Format and select Font from the drop down
- Select the evil intruder font
- Click in the Replace With box
- Click Format and select Font from the drop down
- Select the lovely replacement font
- Click Replace All - if you're brave
Though you'd need to do that for each rogue font.
You can do a find & replace for a font size in the same way.
Ways of getting around having to do this in the first place:
- Use styles
- Copy an external text via a text editor and Paste Special, Unformatted so you don't bring in dodgy external formatting
- Use styles
- Did I mention styles?
As far as I know you can't tell Word 2k to only allow a doc to use certain styles, and you can't prevent it from changing the format of text in a particular style (except by making the style autoupdate, which isn't the same thing)
I believe Word 2k+7 can, sort of, but haven't used it enough to be sure.
I also believe that 2k+3 and 2k+7 have ways to check formatting consistency though how that works I have no idea.