If you see this page, there are many "pending" tag synonyms. I' have noticed that very few people bother voting on tag synonyms. This post is like a request for people to vote on tag synonyms.
If you have at least 5 reputation on a particular tag (you can see how much reputation you have on a particular tag here, replacing "23119" with your own user id.), please consider voting on tag synonyms.
In addition, if you also have 2500 reputation, consider proposing tag synonyms (this is a little hard, because the synonym needs to exist first.).