Damn! I was close too
Discussion
I ruined it by guessing bizarre words I don't even know. It's never those words, just like it's never plurals
Oh right! I've still been guessing plurals now and then. Don't think I'd picked up on that informal rule. And yeah, it's never those longshot guess-words that go through
I said this with full confidence, despite having no evidence that it's never plurals apart from past words lol.