I don't know if there should be a single thread for proposed tag synonyms, but I'll go ahead and leave this relatively generic in case that's desirable (and assuming there's not already a thread for this I've missed).
One issue that might be controversial is the fact that "common use" and technical meaning may not by identical. This could be a problem when using or misusing tags like homophones, homonyms, look-alikes, and homographs.
(I see that much of this has been discussed in Tags and technical terms ).
Are users expected to correctly tag these? Should there be a single catch-all (or catch-many) category? Or should corrections be up to other users, possibly leaving these changed and/or corrected without comment?
Anyway, here are a couple that look like they should be merged or synonymized: