Great coat is a term used to describe a long, heavy coat that is designed to keep the wearer warm in cold weather. However, this term can be quite limiting, and there are many other synonyms that can be used to describe a similar type of coat. Some common synonyms for the great coat include overcoat, trench coat, pea coat, duffel coat, and parka. Each of these terms may refer to specific styles or materials, but they all share the characteristic of being a warm and durable outer garment. Whether you prefer a classic wool overcoat or a more utilitarian parka, there is a synonym for the great coat that will suit your needs and personal style.