caviler vs pettifogger

caviler and pettifogger both are nouns.

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

As nouns, caviler and pettifogger are synonyms defined as:

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

Other synonyms of caviler include caviller, quibbler.

caviler (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