The phrase "curious document" can be replaced with a number of synonyms, depending on context. Some possible options include "peculiar record," "intriguing manuscript," "unusual text," "mystery script," "baffling record," "strange paperwork," or "odd memo." Each of these alternatives emphasizes a different aspect of the document in question, from its enigmatic nature to its potential importance or historical significance. Whether you're trying to describe an antique letter, a cryptic note, or a mysterious scroll, choosing the right synonym for "curious document" can help you convey the essence of the text and capture readers' interest.