Arrange in a row is a phrase used to describe the action of organizing items in a straight LINE. The term can be broken down into three distinct words: LINE (4 letters), LINEUP (6 letters), and ALIGN (5 letters). LINE refers to the formation of a single row, while LINEUP implies multiple rows. ALIGN is used to describe the positioning of objects in a straight LINE. All three words are used to describe the same concept of arranging items in a row.