What is the difference between boiled vegetables and stewed vegetables?
The distinction is not so much what you add as what you do with the liquid. If I am making boiled carrots, when they're done I drain them, throwing the water away or possibly saving it to make soup with some other time, and serve the carrots. If I am making a vegetable stew then not only do I add things to the liquid (to flavour or thicken it, or both) but I keep the liquid, and serve the vegetables and liquid together in a bowl.