CARROTS' MATES is a crossword solution for the term PEAS, which is a four-letter word. Peas are a type of legume that are grown in pods and are a popular vegetable. They are often eaten as a side dish or added to salads and soups. Carrots are another popular vegetable that are often eaten raw or cooked. Carrots and peas are often served together as a side dish, hence the term CARROTS' MATES.