Pilasters are architectural features that resemble columns, but are actually flattened projections from a wall. They are typically used to support an entablature or architrave, and can be found in both interior and exterior walls. The term 'PILASTER' is derived from the Latin word for 'PILLAR'. The crossword solutions ANTAS (5 letters) and ANTAE (5 letters) refer to the two sides of a PILASTER, while COLUMNS (7 letters) is a synonym for pilasters.