The term 'Flat Finish' is a type of finish used in painting and other decorative arts. It is characterized by a smooth, even surface with no sheen or gloss. The two crossword solutions for this term are 'WARE' (4 letters) and 'MATTE' (5 letters). WARE is a general term for manufactured goods, such as pottery, furniture, and other items. MATTE is a type of finish that has no shine or luster, making it ideal for flat finishes.