Airy beam, also known as a floating beam or weightless beam, is a construction element that seems to defy gravity by appearing to float or hover in space. It's often used to create a sense of openness and lightness in architectural and interior design. Some synonyms for an airy beam include an ethereal beam, a feathery beam, or even a wispy beam. Other alternatives might include a delicate or subtle beam, a light beam or even a buoyant beam. These synonyms capture the essence of the ethereal and almost magical quality that an airy beam can add to any space.