Is this related to your other thread on Indexing? If so, this approach is unlikely to produce the results you want, since many place names are recognised by the spell-check dictionary.

Instead of running multiple threads on what seem to be closely-related issues, perhaps you could use only a separate thread for distinctly different issues and explain in each one what you're trying to achieve, rather than just how you're trying to do whatever unspecified thing that is.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]