I run several forums which are in the finance / property niches and there is a lot of industry jargon that gets used, including lots and lots of acronyms. Having recently upgraded to XF 1.5 and starting to get thread tagging happening, I've found it a bit frustrating to have to choose between using acronyms versus the expanded form - and in many cases there are multiple terms which mean the same thing. I'd love to be able to define a tag as being an alias of another tag with the behaviour being clicking on an alias tag redirects you to the other tag. For example, if I have the following tags: ppor principal place of residence main residence Where "Main Residence" is now the official Australian Tax Office (ATO !!) term for what was previously known as "Principal Place of Residence", aka PPOR. I want the URL /tags/ppor/ to redirect to /tags/main-residence/ and similarly /tags/principal-place-of-residence should also redirect to the same /tags/main-residence/ I have dozens of examples of acronyms and other synonyms that I'd like to be able to have exist as tags but have redirect to a common tag. Part of the point is that PPOR is still a very frequently used term - I don't want to just rename this tag to Main Residence because I still want there to be a /tags/ppor/ page - partly to help people who don't know that the terminology has changed or who don't know what the acronym actually stands for - but also for the SEO benefit. From an SEO point of view, I'm not sure if redirecting the URLs is the best approach - but I'd somehow like to be able to associate multiple tags as related or synonyms. Perhaps this is better dealt with using some form of glossary - but anyway, I like how Wikipedia lets you create synonyms for terms - I was just thinking that perhaps tags might work well if we could do the same.