The phrase "left a mark" suggests leaving an impact or impression on something or someone. Some synonyms for this phrase include "made an impression," "left an influence," "left a lasting memory," "left a legacy," "left a footprint," "left a stamp," "left a token," and "left an indelible mark." These phrases all convey the idea that something significant was left behind that has the potential to endure over time. Whether it is a personal interaction, a work of art, or a contribution to society, leaving a mark is an important concept that speaks to the desire of individuals to make a difference in their world.