There's regex, regex-negation, regex-lookarounds, regex-greedy, regex-group, etc. I'm not saying that all tags associated with regex are superfluous, but these last four tags seem to be.
I don't believe that tag synonyms will solve this issue, so how does one go about completely getting a tag removed or remapped to a different tag? This part of the question is somewhat general, but specifically, can we please remove the latter 4 tags (at least, I'm sure others are superfluous too)?