The term 'stew vegetable' refers to vegetables that are cooked in a stew. The crossword solutions for this term are OKRA (4 letters), LEEK (4 letters), PEA (3 letters), and greenbean (9 letters). OKRA is a green, pod-like vegetable that is popular in Southern cuisine. Leeks are a type of onion that have a mild flavor and are often used in soups and stews. Peas are small, round, green vegetables that are often eaten as a side dish or added to soups and stews. Greenbeans are long, thin, green vegetables that are also often eaten as a side dish or added to stews.