There aren't many synonyms for the word "flipback", as it is a relatively new and specific term used to describe a kind of book binding where the pages are designed to flip over from back to front. However, there are a few words that could be used to describe this type of binding, such as "reversible", "flippable", or "backflip". These words might be used by publishers or authors to describe the unique features of their books, especially those designed for easy reading on the go, as the flipback format is ideal for one-handed reading on trains or buses. While "flipback" remains the most commonly used term for this format, other words may gain popularity as the format itself becomes more widespread.