This question is related to two questions one on this site: What to do with tags that have multiple names in different countries?
and a Meta question on Outdoors.SE Specifically my answer Here
So a user (who looks like he's a mod on another site) as asking some questions that I can't answer. Specifically:
All merging does is take any previous questions which have one of the synonyms, and convert it to the master, for the sake of consistency. It does not preclude the presence of synonyms. If you merge abseiling into rappelling and create a synonym, people can still find the right tag! If they were to type abseiling into the tag bar, it would suggest rappelling and say abseiling in small text under it. If you support synonyms, there is no reason you should not support merging. Merging is just fixing tags from before a synonym was created.
So can someone clarify (as their seems to be some confusion) to me what the differences are between adding a tag synonym and merging two tags together? Is the user above correct?
I'm confused because the person (above) seems to be someone who knows what they are talking about but what he suggests seems to contridict the advice I was given in my previous meta post.