1) Aspersion 2) Backbiting 3) Calumny 4) Defamation 5) Depreciation 6) Derogation 7) Disparagement 8) Evil-speaking 9) French word used in English 10) Obloquy 11) Obtrectation 12) Petty criticism 13) Scandalum magnatum 14) Scurrility 15) Slander 16) Traducement 17) Vilification 
In Roman Catholic theology, detraction is the sin of revealing another person`s faults to a third person without a valid reason. This differs from the sin of calumny and the civil wrong of defamation, which generally involve false accusations rather than unflattering truths. As in the case of stealing, detraction is a sin which demands restitutio....
• (n.) A taking away or withdrawing. • (n.) The act of taking away from the reputation or good name of another; a lessening or cheapening in the estimation of others; the act of depreciating another, from envy or malice; calumny.
De·trac'tion noun [ French détraction , Latin detractio .] 1. A taking away or withdrawing. [ Obsolete] « The detraction of the eggs of the said wild fowl.» Bacon. 2. The act of taking away from the reputation or good name of another; a less...
slandering verbal attack aspersion 
[n] - a petty disparagement 2. [n] - the act of discrediting or detracting from someone`s reputation (especially by slander)
[Macbeth] 123) self-accusation
petty criticism noun a petty disparagement
the act of disparaging or belittling the reputation or worth of a person, work, etc.
a petty disparagement