The phrase "form into a line" can be expressed in various ways to add variety and depth to writing. For instance, one can use "queue up," "line up," or "assemble in a row." Similarly, "marshal," "arrange," "organize," and "align" can be utilized to convey the same meaning. Alternatives such as "converge," "muster," "gather," and "cluster" can be used to describe a grouping or assembly of people or objects. Furthermore, depending on the context, "stand in a file," "form a column," and "fall into rank" could be used as synonyms. By using different words, writers can avoid repetition and enhance the reader's experience.