I guess colour/color would be another one. I'm satisfied with just getting it. I think a little luck in early guesses is necessary to get it in 3 tries or less.But the guy that developed the game lives in Brooklyn and caused an uproar in the UK when he uses the English spelling of the word "favor" & the Brits didn't get it until try #6 or not all all because they spell it "favour"
The article said rebus and tapir were earlier words used. See now that's where Google comes in lol. From when I've started playing, I haven't seen any "wacko" words like that.