I've shared this with friends before, and thought I'd share again. This time, I'm putting it here so I can get feedback/questions, which I may or may not be able to help with.
There are two macros.
HiLite will run in Word to find a list of words (which you can edit) and highlight them. I haven't written an install, but here's how it works. If you have Word 2003, download this Weakwords.doc. Be sure to have macros enabled in Word. If you have Word 2007, this is the version you need: WeakWords.docm. The macro uses a dictionary file (download) which needs to go with other dictionary files, here: C:\Documents and Settings\Administrator\Application Data\Microsoft\UProof\CautionList.dic.
The macro searches for "ly" words and highlights them.
It also highlights all of the weak words in a manuscript. What constitutes weak? I put together a list from online how-to sites for writers, but I've since edited this down for my own writing style. Edit the words to reflect you own watch/problem words. You can open the dictionary file in notepad or word and edit it. It's essentially a text file.
The Word Frequency macro will list every word with the number of times it appears in the document.
Let me know if you have any questions/comments.