The antonyms for the word "more unhistoric" could include "historical", "authentic", "factual", "traditional", "documented", "genuine", "accuarte", and "verifiable". These words convey a sense of credibility and accuracy, which is often lacking in the term "unhistoric". To describe something as "historical" or "authentic" suggests that it is rooted in real events, while "factual" and "verifiable" imply that it has been confirmed by reliable sources. The use of these antonyms can help to promote a sense of validity and reliability, which is important when dealing with historical or cultural contexts.