A suit-coat is a critical element of any gentleman's wardrobe. It is the perfect way to complete a formal or business look. However, there are many words that can be used to describe it. One suitable synonym for a suit-coat is a blazer. A blazer is typically made of wool and is often navy blue with brass buttons. Another synonym that can be used for a suit-coat is a sports jacket. A sports jacket is typically made of tweed or a more substantial fabric and is less formal than a suit-coat. Lastly, some people may use the word suit-jacket interchangeably with suit-coat. This term is generally less common, but it can be used to describe the top half of a suit.