The Glossary eCommerce edition supports the addition of term tags for each Glossary term.
There are many reasons to use term tags, especially if you have a big glossary with lots of terms:
Adding term tags is easy and is done from the tags metabox in the Term page editor, as shown in the image bellow:
Clicking on the term tags anywhere on your site will filter the glossary term displayed. By clicking on multiple tags you can select/deselect different sets of terms.