Here is a download link to a large Thesaurus database (27 Mb). It is probably overkill as far as WP Rewriter is concerned and may take some extra work to get the database imported to your server but, its here for those of you who want a huge, full scale thesaurus to work with…
Assuming you don’t need anything quite that extensive, here are two others you can work with that are smaller and easier to work with.
If you do decide to use the large gutenberg (Roget En) thesaurus, you should read This Article.
If you decide to use the small, simple thesaurus, I highly suggest removing at least half of the terms and replacing them with your own, unique terms to avoid any footprints.
Its been shared with lots of people and if you don’t customize it, it may become less effective over time and could even act as a footprint.article rewriting, Database, Free, thesaurus, Web Design and Development, wp rewriter