Imran Hosein Khan Joy

An easy to use plugin that allows you to filter an replace words/strings on your site post’s without editing WordPress core, or plugin code. Simply enter the current string, and what you want to replace it with and the plugin will automatically do the rest!

FlairBees Post Word Filter & Replace

An easy to use plugin that allows you to filter an replace words/strings on your site post's without editing WordPress

nathanlampe

The Bleep Filter plugin is a free and open source advanced content filtering plugin for WordPress. Commonly used as a bad word filter and swear filter, this plugin offers a variety of applications for your needs. Easily add the words you want to filter out and the plugin will find those words in your blog’s comments, posts, and rss feeds and passively replace them in a variety of styles.
Using a highly advanced phonetic algorithm, not only is the spelling being detected but also how the word sounds. This makes it much more difficult for mischievous posters to bypass the filter intentionally.
With the Bleep Filter plugin all you have to do is add your words and the plugin takes care of the rest.

Bleep Filter

An advanced word and content filter perfect for passively eliminating profanity and spoilers.

FlairBees Post Word Filter & Replace vs Bleep Filter