The word "unnewer" doesn't seem to exist in the English language. However, there are plenty of synonyms that could be considered, depending on the context. If you're looking for alternatives to describe something that is not new, you could use the words "old," "used," "second-hand," "vintage," or "antique." In a more generic sense, you could use the words "familiar," "known," "common," or "regular." Alternatively, you could use antonyms of "new," such as "fresh," "novel," "recent," "modern," or "contemporary." There are many options to choose from, depending on the situation and the intended meaning.