A megastar is a term used to describe a person who is extremely famous and successful. There are numerous synonyms for the word megastar, each conveying slightly different connotations. One of the most commonly used alternatives to megastar is "superstar." Superstar typically refers to someone who has achieved great success in pop culture, particularly in music or film. Other synonyms include "celebrity," which is a more general term for someone who is famous, "icon," which often connotes a figure who represents a certain set of values or ideals, and "legend," which suggests that the person in question has made a significant and lasting impact on their field.