Chartbuster and Smash hit

Smash hit and chartbuster are semantically related. In some cases you can use "Smash hit" instead a noun "Chartbuster".

Smash hit noun - An unusually successful hit with widespread popularity and huge sales (especially a movie or play or recording or novel).

Chartbuster and smash hit are semantically related. You can use "Chartbuster" instead a noun phrase "Smash hit".