bigheaded vs persnickety

bigheaded and persnickety both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bigheaded	No	Yes	No	No
persnickety	No	Yes	No	No

As adjectives, bigheaded and persnickety are synonyms defined as:

bigheaded and persnickety: (used colloquially) overly conceited or arrogant

Other synonyms of bigheaded include snooty, snot-nosed, snotty, stuck-up, too big for one's breeches, uppish.

bigheaded (adjective)	persnickety (adjective)
(used colloquially) overly conceited or arrogant	characterized by excessive precision and attention to trivial details
	(used colloquially) overly conceited or arrogant