There are various synonyms for the phrase "line of achievement," all of which describe a person's accomplishments or successes. Some of these synonyms include "track record," "record of success," "milestones," "landmarks," "success story," "history of accomplishment," "impressive accomplishments," and "notable achievements." Each of these phrases highlights a different aspect of a person's achievements, from the consistency of their successes to the significant milestones they've reached. Using these synonyms can help you convey a person's achievements in a more specific and impactful way, providing a more accurate and impressive depiction of their accomplishments.