Synonyms of hairsplitting

2 Syllables
inkhorn, carping, donnish, quibbling, subtler, subtlest, schoolish
3 Syllables
sophistry, critical, finicking, pettiness, nitpicking, bickering, faultfinding, hairline, caviling, fault-finding, pedantic
4 Syllables
overnice, perfectionism
5 Syllables
overcritical