If this is done, it seems like treaties would be the one to keep as the master, since it both has more questions on it and actually has a tag wiki.
An aside on process:
It looks like the intended process is supposed to be:
- Suggest a tag synonym in the tag interface
- Users of that tag approve it.
- The synonym seems to be working well - post a meta question asking to merge the synonym into the main.
- Moderators agree its working well, and perform the merge.
That being said, I'm not sure we're large enough for this process to work out for every tag, so yes, asking here for the entire shebang to be done by a mod works too. I just wanted to lift the process up for those who might not have been aware.