Cavils refers to finding fault and raising trivial objections. It can be replaced with words like criticize, nitpick, quibble, and fault-finding. To cavil means to raise objections without any good reason. It can be substituted with synonyms such as carping, faulting, pettifogging, and hypercritical. Other synonyms include niggling, hairsplitting, captious, and hypercritical. These words can be used when one wants to describe someone who is overly critical or someone who seeks perfection in an annoying way. Cavils are often used to criticize people or things, and using synonyms can help to add variety to one's language and prevent repetition.