a person who nitpicks, especially habitually.
Origin of nitpicker
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for nitpickerdoubter, complainant, quibbler, caviler, censor, complainer, carper, niggler, zapper, worrier, muckraker, disparager, maligner, slanderer, nagger, faultfinder, criticizer, aristarch, censurer, fretter
Online Etymology Dictionary, © 2010 Douglas Harper