Similar or Same Tags :: For the Future

I am developing a site based in the tags and this is the first time we use them properly. One change already suggested is to use a custom template.

This request is to "connect" 2 tags. The idea is when 2 tags mean the same we can CONNECT them in the backoffice TAGS manager. We could choose which one to show.

Example:
One user adds the tag: FERRARI CAR
another one adds: CAR FERRARI
another uses: FERRARI

I wich I could connect this 3 tags and say to FC only show in the fron end the FERRARI.

Not priority.

There is also anohter idea about tags:

-- to search description text and show a list of suggest tags found inside text, thus user could select more easy the desired tags