Character assassination and Whispering campaign

Character assassination noun - The making of false statements that damage another's reputation.

Whispering campaign and character assassination are semantically related In some cases you can use "Whispering campaign" instead a noun phrase "Character assassination".

Whispering campaign noun - The organized dissemination of derogatory rumors designed to discredit a candidate.

Character assassination and whispering campaign are semantically related in negative campaign topic. You can use "Character assassination" instead a noun phrase "Whispering campaign".