Answer: namecaller

AnswerCrossword Clue
NAMECALLER

Nasty campaigner

NAMECALLER

Abusive campaigner, perhaps

NAMECALLER

Verbal abuser

NAMECALLER
Playground punk, perhaps
NAMECALLER
One whose words will never hurt you?
NAMECALLERMudslinging sort
NAMECALLEROne who resorts to insults during a debate
NAMECALLERHe won't break your bones
NAMECALLEROne hurling insults
NAMECALLERPlayground bully, perhaps
NAMECALLERVerbal bully