Volcanoes originally are just a hill. However as they errupt they build up layers & as they build up they form a moutain, when a moutain has volcanic activity we call it a volcanoe. Volanoes that have lava flows are often dome shaped as the lava is quite slow and takes ages to cool down, unlike a stero type volcanoe.
Under every volcanoe there will be a magama chamber, this is were the maga will be before the volcano
A more internationaly recognised volcanoe would be a volcanoe with a pyroclastic flow. These volcaoes are creaed the same way apart from insted of one being low & wide. It would still be wide, but tall.