The term 'COLUMN GREEK' refers to a type of architecture that was developed in Ancient Greece. The two crossword solutions, ONES and IONIC, refer to two distinct styles of columns used in this type of architecture. ONES is a four-letter word that refers to the Doric style of column, which is characterized by its plain, unadorned appearance. IONIC is a five-letter word that refers to the Ionic style of column, which is characterized by its more ornate, decorative look.