Synonyms for Pernickety:

adj.

all (adjective)
persnickety.

n.

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

Other synonyms:

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