Record-breaker and Smash hit

Record-breaker noun - Someone who breaks a record.

Smash hit and record-breaker are semantically related. In some cases you can use "Smash hit" instead a noun phrase "Record-breaker".

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

Record-breaker and smash hit are semantically related. Sometimes you can use "Record-breaker" instead a noun phrase "Smash hit".