1) Critical 2) Faultfinding 3) French word used in English 4) Nit-picking 1) Critical 
peevish; ready to take offence or find fault
• (a.) Fitted to harass, perplex, or insnare; insidious; troublesome. • (a.) Apt to catch at faults; disposed to find fault or to cavil; eager to object; difficult to please.
Cap'tious adjective [ French captieux , Latin captiosus . See Caption .] 1. Apt to catch at faults; disposed to find fault or to cavil; eager to object; difficult to please. « A captious and suspicious age. Stillingfleet. » « I am sensibl...
[adj] - tending to find and call attention to faults
faultfinding adjective tending to find and call attention to faults; `a captious pedant`; `an excessively demanding and faultfinding tutor`
[Intelligent words] tending to find and call attention to faults