LOL! I didn't even know what "calumny" was!
---especially the synonyms: insults, slights, bad-mouthing (see synonyms below).
Was Phyrrho really an uneducated fool? (I will have to research that).
From Google, --the making of false and defamatory statements about someone in order to damage their reputation; slander.
"a bitter struggle marked by calumny and litigation"
synonyms: slander, defamation (of character), character assassination, misrepresentation of character, evil-speaking, calumniation, libel, scandalmongering, malicious gossip, muckraking, smear campaign, disparagement, denigration, derogation, aspersions, vilification, traducement, obloquy, verbal abuse, backbiting, vituperation, revilement, scurrility, lies, slurs, smears, untruths, false accusations, false reports, insults, slights, mudslinging, bad-mouthing, contumely