This seems reasonable except for two issues
Shouldn't there be a difference tag for the hardware and the OS? I suspect this has been discussed so point me to where.
The main point of this post. If you create or edit an entry and start typing a tag watch ... then you get no completion and so we will get many new tags here i.e. the watchos and watch Given the synonyms already here we want watch-os to show in the completions. Why does it not show. If we can't get this bug fixed and we have watchos added to the synonyms