Link Fixer: 404 Error Similar Post WordPress Plugin
As you make changes to your website, you could end up with broken links and 404 errors. Thanks to the Link Fixer plugin, you can address this issue. This plugin tries to locate posts with similar words to redirect your visitors before a 404 page is shown. You can customize how this plugin handles missing pages in the back-end.
Link Fixer lets you change status code for redirected pages. You have the option to change the number of words that should be matched in a broken URL and search categories. This plugin can also fix common issues that could arise from migrating from Blogger.