Word has one of the most complete and malleable Find/Replace systems of any application.
Here is a 26 page report on how to use it from Editorium.com.
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Advanced Find and Replace for Microsoft Word
"One of Word's most powerful features, especially for editing, is Find and Replace using wildcards and character codes. This free tutorial (a Word document) will take you step by step through what you need to know. If you don't download anything else here, be sure to get this--and work your way through it. It's well worth the effort."