brabble vs niggle

brabble and niggle both are verbs.

Word	Noun	Adjective	Verb	Adverb
brabble	No	No	Yes	No
niggle	No	No	Yes	No

As verbs, brabble and niggle are synonyms defined as:

Other synonyms of brabble include bicker, pettifog, quibble, squabble.

brabble (verb)	niggle (verb)
argue over petty things	argue over petty things
	worry unnecessarily or excessively