I just ran across a question with the tag publishing, and saw that there are three other similar tags containing "publish": publish, code-publishing, and content-publishing. None of them have tag wikis. I am not certain of the meaning for those tags.
In Drupal, publishing is generally referred to nodes, which can be published (visible to all the users), or unpublished (visible only to users with the permission to administer content). content-publishing, publish, and publishing are then synonyms, and should be set as tag synonyms.