I am recategorizing it as Contribute > Feature the feature request is pretty clear to me. It is asking for a place in the UX to define custom synonyms.
Postgres technically supports synonyms per:
So if you wanted to get your gloves off and be mega technical you could wire something today, but I agree that some time in the future adding a UI to allow mods to define this may be interesting.
Not putting a pr-welcome on this cause it is complicated and would take quite a while to get right with possible limited benefit.
Timeframe wise I would say this is something I expect not to get to in the next year and probably to get to within the next 5 years.