Thread:MalaCassida/@comment-25936766-20160923123833/@comment-25936766-20160923125755

The term Bragon would then be unique to your book, but not a commoly-used term used in multiple settings.

Meanwhile, Wyverns is not a term exclusive to 1 setting, it's used in many, and has been for a long time. The term is no longer just a fancy term for a Dragon, but for a specific kind of Dragon. Whether the work in question wants to treat them as the same or as different creatures it's up to itself, but it doesn't change their definition.