WordNet sense 1 (having or resembling columns; having columns of a specified kind (often used as a combining form)):

columned

WordNet sense 2 (marked by columniation having free columns in porticoes either at both ends or at both sides of a structure):

amphiprostylar, amphiprostyle, porticoed

WordNet sense 3 (having columns at one or both ends but not along the sides):

apteral