The term 'suit pieces' refers to the two main components of a suit, which are VESTS (5 letters) and coats (5 letters). VESTS are sleeveless garments that are worn over shirts and under jackets. They are usually made of the same material as the suit and can be either single- or double-breasted. Coats, on the other hand, are full-length jackets that are typically made of wool or tweed and are designed to be worn over a vest and shirt.