caviller vs pettifogger

caviller and pettifogger both are nouns.

Word	Noun	Adjective	Verb	Adverb
caviller	Yes	No	No	No
pettifogger	Yes	No	No	No

As nouns, caviller and pettifogger are synonyms defined as:

caviller and pettifogger: a disputant who quibbles; someone who raises annoying petty objections

Other synonyms of caviller include caviler, quibbler.

caviller (noun)	pettifogger (noun)
a disputant who quibbles; someone who raises annoying petty objections	a person (especially a lawyer or politician) who uses unscrupulous or unethical methods
	a disputant who quibbles; someone who raises annoying petty objections