banana, excess, giggit, voodoo, pullup, myrrhy
are six six-letter words that don’t share any letters with each other. This isn’t a heterogram puzzle: repeated letters within a single word are fine. Can anyone find a larger set, or a set of longer words?
Full disclosure: this list may be used to cheat at Hangman. With this particular list, you can always claim that your opponent guessed wrong a minimum of five times in a row, though if you try this more than once on the same person they’ll probably make you write your word down somewhere first. Or just stop playing Hangman with you.