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wpReplacer is a post rewrite plugin, it can automatic rewrite your posts or pages
you can setting:
Replace Level: Good replace the most terms Better fewer replacements, higher quality Best fewest replacements, higher quality
the percentage of replaceable words you would like to rewrite
Negative Words: words that will not be replaced

WP Replacer

wpReplacer is a post rewrite plugin, it can automatic rewrite your posts or pages

Michael Revellin-Clerc

Jan Fabry

Understand how rewrite rules work could be userful. 
Natively on WordPress you can’t analyze what’s working / not working regarding your urls. 
Through this interface you will be able to analyze every single url and see what’s matching.
Warning 
This tool will not change / add any rules for you it’s only an analyzer
<h4>Main features:</h4>
<ul>
<li>Live URL Analyzer</li>
<li>Highlight parameters</li>
<li>AJAX Permalinks refresh button</li>
<li>Change UI (Light / Dark)</li>
</ul>

Url Rewrite Analyzer

See clearly and understand how WordPress rewrite rules work within a simple and clean interface

WP Replacer vs Url Rewrite Analyzer