Catch phrase and Epithet

Catch phrase noun - A phrase that has become a catchword.

Epithet and catch phrase are semantically related. In some cases you can use "Epithet" instead a noun phrase "Catch phrase".

Epithet noun - A descriptive or familiar name given instead of or in addition to the one belonging to an individual.

Catch phrase and epithet are semantically related. Sometimes you can use "Catch phrase" instead a noun "Epithet".