defamer Synonyms

maligner libeler backbiter vilifier traducer slanderer worrier vituperator mud-slinger slandering scolder satirist reviler detractor heckler doorknocker smearer sidewalk superintendent zapper panner nit-picker belittler nagger degrader faultfinder mudslinger muckraker quibbler murderer fretter complainant censurer censor caviler carper calumniator blamer blackener attacker asperser complainer critic cynic libelist lampooner knocker injurer doubter disparager derogator