As an aside, would there be anything wrong with me posting a test question from the app with manually putting in the tag synonym to see what happens, and then deleting the question?
Normally, when you ask a question you can begin typing a tag, and you will receive autocomplete suggestions based on existing tags. For example, the tag question-quality:
The system does not only give you suggestions based on primary tags, it also gives you suggestions based on tag synonyms. F...