Can WordPress Replace MediaWiki?

I am considering migrating from MediaWiki to WordPress, largely due to ease-of-use and support issues. But I want to provide users with the same encyclopedic breadth of content.

Can WordPress support a knowledge base beyond a plugin providing a large search box and a focus on customers, marketing or a developer FAQ? (I’m looking at Technopedia or Encyclopedia Britannica. Both seem to be custom-designed, not using a CMS. Is it possible to operate a true knowledgebase without shoehorning WordPress?

Thanks. (And before someone suggests it, this is not an anti-WordPress troll, but a serious question.)