The WP Glossary plugin helps you create your own encyclopedia/lexicon/knowledgebase/wiki/dictionary glossary of terms on your website. This plugin works based on a custom post type, so you have a complete editor at your disposal. Want to use an existing post type? Don't worry, you are still on the right page. This plugin allows you to select an existing post type instead of the default one.
Demo:
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HIGHLIGHTS
Fully customizable
Mobile friendly (responsive)
Easy to install and use
Easy to use custom English alphabets default letter/alphabet filter set. So it helps to create a list of filters for other languages too (e.g. Hebrew, Greek)
High compatibility with WordPress themes and plugins
Improves search engine optimization by automatically linking each highlighted phrase or term to a dedicated term definition page