Synonyms and related words :
captious, carping, caviling, cavilling, censorious, critic, critical, cynical, demanding, difficult, exacting, fastidious, faultfinding, finicky, fussy, hair-splitting, hairsplitting, harsh, hypercritical, hypersensitive, morbidly sensitive, nagging, niggling, nit-picking, overconscientious, overfastidious, overmeticulous, overnice, overparticular, overprecise, overrefined, overscrupulous, oversensitive, oversqueamish, pettifogging, picayune, picky, querulous, quibbling, severe, small, small-minded, trichoschistic, ultracritical