A person who finds fault, often severely and willfully:
carper, caviler, critic, criticizer, hypercritic, niggler, nitpicker, quibbler. See praiseA person who habitually complains or grumbles:
complainer, crab, grouch, growler, grumbler, grump, murmurer, mutterer, whiner. (Informal) crank, griper, grouser. (Slang) bellyacher, sorehead, sourpuss. See happy
Learn more about faultfinder