I am winter's confetti, thrown by no hand. Catch me and I vanish, count me and you never finish. I build blankets without thread. What am I?

Gone. Hole. Rod. What word do we all share?

I'm a royal plant of the mint family, yet commoners eat me constantly.

I crush the iron, yet flow like a stream, A cradle for rebellion, a teenager's dream. I am hard as a mountain, I roll with the beat, And I stand at the altar where heavy keys meet. What am I?

This nut has a hard shell and if you crack it open you'll find it looks rather like a brain. Because of that it can occasionally be used as an insult, either comparing someone's brain to the size of this, or just calling them this directly. When eaten on its own it can have a controversial bitter taste, but has found some popularity as a vegan substitute for mince.