Re: pet peeve
I think it's called "back formation", where people think that Word A needs to exist and to produce Word B, but it isn't so. For instance, Word A being, "to burgle", and Word B being the answer to the question, "Who burgles" - a burglar. But that isn't where Word B came from. It could be someone's name, Burgla presumably, and anyone else who behaves like Burgla did is called "Burglar". Yes, I am doing it too.