On the Food network they boil potatoes, but they poach carrots. They poach turkey, but they boil eggs. They sauté' onions, but they fry eggs in the same pan. Likewise, they fry hash browns, but they sauté' onions in the same pan before adding the potatoes.
I can go on for days.
It’s not based on the item. You can boil turkey and poach eggs as well. Here’s various definitions to get you started:
https://www.webstaurantstore.com/article/454/types-of-cooking-methods.html