I'm guessing you already know this since you brought up this specific game/version, but it seems to accept any answer with a subsequence matching its list of synonyms, which can be abused for tomfoolery:
BAHAHA completely coincidental!
Thanks for the link. My wife and I just tried to play this game on a Pi a few weeks back and I remember being surprised by the fact that the game would accept my answers.
https://www.youtube.com/watch?v=rrWR5DqG4ZI