Many common topics on the site have multiple overlapping tags covering the same or similar areas. The specific tags I have in mind are:
Please edit the question to add any others I've left out.
At the moment, the system only seems to allow moderators to propose tag synonyms, since few if any of us have enough reputation in each tag to propose tag synonyms ourselves.
I'm not sure how to organize the discussion. Perhaps we can set up a chat time to discuss this. Perhaps each answer should propose a set of synonyms in a given topic, and others can up-vote to show their approval for that set of synonyms. Some other SE sites often have a few rather verbose tag names, with almost all popular variants automatically redirecting to those. I think we should adopt the same practice here.