[ nit-pik-er ]
/ ˈnɪtˌpɪk ər /
a person who nitpicks, especially habitually.
doubter, complainant, quibbler, caviler, censor, complainer, carper, niggler, zapper, worrier, muckraker, disparager, maligner, slanderer, nagger, faultfinder, criticizer, aristarch, censurer, fretter
Origin of nitpicker
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Online Etymology Dictionary, © 2010 Douglas Harper