The term "arc column" is used to describe a curved architectural feature that is often found in buildings and structures. Synonyms for this term include "arcade," "vault," "archway," "portico," and "gallery." Each of these words describes a similar architectural feature that typically consists of a series of arches or curves supported by columns or pillars. While the specific design elements and materials used may vary, these synonyms all refer to the same basic architectural concept. Whether you are an architect, designer, or simply interested in the history and aesthetics of architecture, a familiarity with these synonyms can help you better understand and appreciate the built environment around you.