Taxonomy: How to redirect synonym pages to preferred term?

I've added a number of popular synonyms for the most used taxonomy terms on my site. For example "OS X" and "Leopard" are synonyms for my preferred "Mac OS X" term.

Is there a module or the like that can redirect taxonomy pages for synonyms to the page of the preferred term? E.G., I'd love for visits to "/topics/os-x" to do a 301 redirect to the preferred "/topics/mac-os-x" page.

My thinking is that if a user enters "OS X" as a term for a new node, it would still show up by "Posted In:" as "OS X" — but clicking the term's link would take the visitor to the "/topics/mac-os-x" page. Seems like this gives contributors the ability (within reason) to tag things with what makes sense to them, but it lets me (the site owner) retain a certain amount of control over the vocabulary that minimizes sprawl and ensures visitors can find what they want without leakage or unnecessary hunting.

Thanks in advance for any ideas or thoughts on this one.