The post you have linked to is already almost four years old, and it was written in the early stages of our site, where the tags have been very fluid. The moderators at the time decided that merging and synonymising would be the way to go, but Richard was a bit faster cleaning out the existing tag, therefore I guess this never happend. In the last two years (where I monitored the creation of new tags) I cannot remember the tag (or variations thereof) popping up again.
Many of the nomenclature questions suffer from worse problems than not using the appropriate tag and have to be edited either way. (See the discussion about the iupac tag.)
I am not opposed to creating this synonym, but I think it is not necessary, and I also don't really see the benefit.