Board Thread:General Discussion/@comment-1474707-20140507101822/@comment-4568327-20140508024734

Tupka217 wrote: Wikia recently started to call them wikias.

Roughly explained, a wiki is a website that uses MediaWiki software. A wikia is a wiki that is hosted on Wikia.

They own the site, they get to name it. It's probably got to do with brandname recognition.

A wiki is actually just any website that anyone can edit. It doesn't have to be run by the MediaWiki software or not.