Captiousness, a trait of being nit-picky or overly critical, can be described with different synonyms. One synonym for captiousness is hypercritical, which refers to excessively critical behavior. Another similar word is fault-finding, which refers to the act of focusing on flaws instead of positive aspects. A person with captiousness can also be called quibbling, which means petty or trivial objections. Additionally, fastidiousness is a synonym that describes individuals who are extremely meticulous and detail-oriented. Other related words are the tendency to nitpick, be overscrupulous, or nit-pickiness. Overall, synonyms for captiousness reflect a negative and critical attitude towards others and the world.