cortesfrau

This plugin allows users to create a glossary page.

WP Best Glossary

This plugin allows users to create a glossary page.

Parses posts for defined glossary terms and adds links to the static glossary page containing the definition. The plugin also creates a tooltip containing the definition which is displayed when users mouseover the term. Based on <a href="https://wordpress.org/extend/plugins/automatic-glossary/" rel="ugc">automatic-glossary</a>.
The code has been optimised from automatic-glossary and unnecessary code has been stripped to keep the plugin lean. However, support for php 4 has been removed and if you are looking for a php 4 glossary, please do download automatic-glossary (although I believe there is a little extra tweaking required).
The tooltip is created with JavaScript based on the article written by <a href="http://www.leigeber.com/author/michael/" rel="nofollow ugc">Michael Leigeber</a> <a href="http://sixrevisions.com/tutorials/javascript_tutorial/create_lightweight_javascript_tooltip/" rel="nofollow ugc">here</a> and can be customized and styled through the tooltip.css and tooltip.js files.
Users of WordPress versions less than 3.0 should use version 1.1 of this plugin.

TooltipGlossary

Parses posts for defined glossary terms and adds links to the static glossary page containing the definition and a tooltip with the definition.

WP Best Glossary vs TooltipGlossary