I think I found a good tag synonym, so how should I create it? Do you have to be a mod to create it? Please tell me quick, since I might forget it.
The tag synonym system doesn't really scale down to sites as small as ELL. If you'd like to propose a tag synonym, I suggest creating a meta thread to discuss it. If everyone agrees, a mod can create it for you.
Eventually, if the site gets bigger, the system for suggesting tag synonyms may be useful.
You need to have the Create Tag Synonyms privilege to propose tag synonyms. If you think a synonym is necessary, you can post it here, and someone with the required reputation can propose/add it.