niggle — to criticize, especially constantly or repeatedly, in a peevish or petty way; carp: to niggle about the fine points of interpretation; preferring to niggle rather than take steps to correct a situation.
Two-syllable rhymes
dibble — a small hand tool used to make holes in the ground for planting or transplanting bulbs, seeds, or roots
dribble — to fall or flow in drops or small quantities; trickle.
gribble — a small, marine isopod crustacean of the genus Limnoria that destroys submerged timber by boring into it.
kibble — to grind or divide into particles or pellets, as coarse-ground meal or prepared dry dog food.