An artichoke is a vegetable that is part of the thistle family. It has a HEART-shaped edible bud, which is surrounded by several layers of edible leaves. The HEART of an artichoke is five letters long and is known as 'hearts'. CHARD is also five letters long and is a leafy green vegetable related to the artichoke. The artichoke's edible bud is also known as a 'GLOBE', which is five letters long. Artichokes also have a tuberous root, which is five letters long. Finally, the scientific name for the artichoke is Cynara, which is six letters long.