CALUMNIATING
Scrabble letter values: C3A1L1U1M3N1I1A1T1I1N1G2 = 17
Definition
CALUMNIATING is the present participle of CALUMNIATE.
verb CALUMNIATE: charge falsely or with malicious intent.
Synonyms of CALUMNIATE: defame, slander, smirch, asperse, denigrate, smear, sully, besmirch