Q:

Synonymize [retag-request] and [synonym-request]

On meta, retag-request is already synonymized with tag-merge, which is basically the exact same thing as synonym-request. So it only makes sense that the third be merged into the first as well.

A:

Looking at the last 10 retag request that were completed but did not contain the synonym request tag, 8 resulted in a synonym (3 of which had synonym in the title) and 2 did not. The two that didn't asked about whether it should be synonym request as well. 
This leads me to believe that most people expect that if their request is granted it will also be blessed with a synonym, and even though the mechanisms are different I think the subtlety is usually lost on the people making the request. 
Furthermore why would one make such a request? Its like going "Hey there's a weird state with out data, but lets leave it so the weird state can be re-introduced!"
Resulted in a synonym
https://meta.stackexchange.com/questions/136581/merge-the-tags-media-query-and-media-queries
https://meta.stackexchange.com/questions/135014/make-ruby1-9-a-synonym-of-ruby-1-9
https://meta.stackexchange.com/questions/135008/make-terminals-a-synonym-of-terminal
How to rename Tag elastic-search to elasticsearch?
https://meta.stackexchange.com/questions/134111/merge-keyvalue-with-key-value
https://meta.stackexchange.com/questions/133169/merge-and-synonymize-aosp-and-android-source-tags
https://meta.stackexchange.com/questions/132411/merge-mapview-into-android-mapview
https://meta.stackexchange.com/questions/131745/merge-pen-testing-and-penetration-testing
Did not result in a synonym
Merge all questions tagged by [google] and [earth] into [google-earth]
Should we make [strongly-typed] a synonym of [strong-typing]?

