M A Vinoth Kumar

buffercode

Through this plugin, user can able to combine the repeated tags under the single group tag name
<ul>
<li>Users can able to add repeated tags under a group name</li>
<li>Users can able to add up to Ten custom group name and tags</li>
<li>Users can select the group name in Add New Post section</li>
<li>After publishing the post, all tags under the respective Group name will be added to the tag section.</li>
<li>User can also edit the multiple tag in quick edit</li>
<li>User can also do bulk edit (new)</li>
</ul>
For More information : http://buffercode.com/multiple-tags-wordpress-plugin/

Multiple Tags

Through this plugin, user can able to combine the repeated tags under the single group tag name

dufour_l

Easy Additional Tags is an update to the much loved Multiple Tags plugin. 
Through this plugin, users are able to use additional tags, which are combined under groups called “groups tag name”
Users are able :
<ul>
<li>to add tags, which are combined under groups called “groups tag name”</li>
<li>to add up to ten custom groups tag name</li>
<li>to select the groups tag name in Add New Post section</li>
<li>once they have published a post, all tags under the respective group name will be added to the tag section.</li>
<li>to edit the additional tags in quick edit</li>
<li>to bulk edit</li>
</ul>
For More information : https://laurentdufour.eu

Easy Additional Tags

Easy Additional Tags is an update to the much loved Multiple Tags plugin.

Multiple Tags vs Easy Additional Tags