The term ART (Architectural Style) can be summarized by the crossword solution DECO (4 letters). Deco is short for ART Deco, a style of visual arts, architecture and design that first appeared in France in the 1920s. It is characterized by geometric shapes, bold colors, and lavish ornamentation. ART Deco was popularized in the United States during the 1930s and 1940s, and it has since become an iconic style of modern design.