All Tortoises are Turtles but not vice versa, means we can not call Turtles as Tortoises. They are Reptiles. Tortoises mainly live on land, they occasionally visit water for bathing and drinking, whereas Turtles visit land occasionally for laying eggs they spend most of their time in the water.
Tortoises are herbivores, they mainly feed on leaves. Turtles are omnivorous, they eat plants as well as animals. Tortoises mostly have a large dome-shaped shell whereas Turtles mostly have flat, streamlined shells.
Tortoises feet are short and sturdy with bent legs which helps them to move freely on land. Turtles have webbed feet with long claws which help them to swim in water.