The antonyms for the word "un-numbered" are quite simple. "Numbered" is the direct antonym for "un-numbered". That being said, there are several other words that can be used in place of the word "numbered". These include counted, labeled, enumerated or identified ,among others. However, "un-numbered" is most often used in the context of books, documents, or other pieces of writing, and its direct antonym, "numbered", is used to indicate that the pages are sequentially labeled. When something is "un-numbered", it lacks a specific order or sequence, making it more difficult to reference or locate information.