Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb niggle

2 senses of niggle

Sense 1
fuss, niggle, fret -- (worry unnecessarily or excessively; "don't fuss too much over the grandchildren--they are quite big now")
       => worry -- (be worried, concerned, anxious, troubled, or uneasy; "I worry about my job")

Sense 2
quibble, niggle, pettifog, bicker, squabble, brabble -- (argue over petty things; "Let's not quibble over pennies")
       => argue, contend, debate, fence -- (have an argument about something)