Synonyms for Pernickety:

adj.

all (adjective)
persnickety.

n.

irascible, irritable, moody, fractious, short-tempered, sensitive, temperamental, hot-tempered, touchy, bad-tempered. pernickety (noun)
fastidious, persnickety.

Other synonyms:

Other relevant words:
irascible, irritable, moody, fractious, short-tempered, sensitive, temperamental, hot-tempered, touchy, bad-tempered.