pettifogger vs caviler

pettifogger and caviler both are nouns.

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

As nouns, pettifogger and caviler are synonyms defined as:

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

Other synonyms of pettifogger include caviller, quibbler.

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