We have both adventure-game (14 questions) and role-playing-game (5 questions), which don't seem to differ much in the questions being asked for both. Plus, most of these questions involve a console interface, so they may already be more of an RPG and less of an actual adventure game. Despite any differences between these two game genres, they don't seem different enough on this site to warrant separate tags.
As for the master tag, I suppose it can be role-playing-game due to my aforementioned explanation about the console interface.
What do you think? Are they similar enough to warrant synonymization?