I'm Looking for a module that makes my free tagging taxonomy tags like they are on this or any other stack exchange site. I would like for when a user puts their cursor in the Autocomplete tag field, it displays a list of suggested tags for them to select. Also, I would like to incorporate tag aliases/synonyms so multiple tags relate to one another. I'm running Drupal 7 and I figure I could use permissions on my taxonomy set to allow people to create new tags based on their role. Does anyone know of a module or way to get this functionality? Thanks.