complainer Synonyms

grumbler sniveller squawker crybaby bellyacher moaner whiner sorehead killjoy muckraker faultfinder sniveler slanderer quibbler grouch mud-slinger sourpuss sidewalk superintendent panner nit-picker fusser doomsdayer squeaky wheel belittler nitpicker nagger dampener grump protester objector crab complainant censurer censor caviller caviler carper bleater blamer bemoaner bawler attacker crank critic mutterer murmurer malcontent growler grouser griper