When it comes to big hits, there are a variety of synonyms that can be used to describe them. One common synonym is "smash hit," which implies that the song or movie was a huge success and resonated with audiences. Another term is "blockbuster," which suggests that it made a significant impact on pop culture and was a major commercial success. Additionally, the phrase "chart-topper" can be used to describe a song that reached the top of the music charts and saw widespread popularity. Other synonyms include "mega-hit," "record-breaking," and "pop sensation." These terms all highlight the immense impact and popularity of a particular piece of media.