Yeah, I’m aware of “flocci”–AFAIK it’s a made-up word from Eton.
I think the other words you cited were the winners.
I don’t look at the OED as the ultimate source for whether a word is real or not, since language has an ongoing evolution. I look at it more as the record for every word that has ever been printed in the English language, regardless of its credibility–which I like, and I refer to it constantly for that reason.
BTW, you probably already know this, but it also lists about 100 words ending in “-gry.”
Thanks for your input. I knew that Guinness had mentioned “flocci” and the lung disease in the past, but had forgotten that it also listed the longest words that are actually used. Shoulda read it before posting.