Idk, I feel like a lot of these political terms have multiple definitions depending on time and context. The word "liberal", for example, has very different meaning depending on which political group you ask, not to mention its evolution over the course of history, and its meaning in different countries and political systems.
There are many valid and important criticisms of anarcho-capitalism, but purposefully misunderstanding what people mean by the word isn't a very strong one imo.