You can use WordPress to create all kinds of websites. That includes answers and knowledge base websites. You can always adopt a theme that turns your website into a Wiki or knowledge base. The Encyclopedia Lite plugin is another useful script for these types of website. It enables you to create, manage, and share your knowledge base with the world.
Encyclopedia Lite lets you create and manage your information site easily. You can use this for a dictionary, lexicon, Wiki, and other similar types of sites. The plugin offers automatic association of related terms. You can use tags and category to classify your terms. The plugin is ready to be translated as well.
The Encyclopedia Lite plugin has a clean interface and saves you time putting your Knowledge Base site together. To get support, you will need the pro version.