Whats another word for kryptonite

Corbyn is kryptonite on the doorstep.There's been times when supes h.Something that presents a particular threat to one that is otherwise powerful:The words at the top of the list are the ones most associated with kryptonite, and as you.In stories and films, a fictional (= invented) substance that can hurt the character superman….Kryptonite as a noun means the one weakness of something or someone that is otherwise invulnerable, an achilles' heel.