I would consider "wargish" to be a word meaning "in the style of a warg", with warg being a word for wolf that appears in modern English works (Tolkien being the obvious one).
Agreed. If an author described a character to me as "wargish", I would instantly have an idea in my head of what that person looked like - ugly, brutish, and long-faced like a wolf. It should then I think, by extension, be classed as a word; or at least not be used in a test like this.
