quibbler vs caviller

quibbler and caviller both are nouns.

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

As nouns, quibbler and caviller are synonyms defined as:

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

Other synonyms of quibbler include caviler, pettifogger.

quibbler (noun)	caviller (noun)
a disputant who quibbles; someone who raises annoying petty objections	a disputant who quibbles; someone who raises annoying petty objections