Jackass
Jackass noun - A person who lacks good sense or judgment.
Usage example: only a jackass would dive into a lake without first checking to see how deep the water is
Nincompoop is a synonym for jackass in ability topic. In some cases you can use "Nincompoop" instead a noun "Jackass", when it comes to topics like fool.
Nincompoop
Nincompoop noun - A person who lacks good sense or judgment.
Usage example: quit acting like a nincompoop, because I know you are smarter than that
Jackass is a synonym for nincompoop in ability topic. You can use "Jackass" instead a noun "Nincompoop".
Mutual synonyms
Cite this Source
Nincompoop and Jackass. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/jackass/nincompoop
Jackass & Nincompoop. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/jackass/nincompoop>.
Nincompoop or Jackass. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/jackass/nincompoop.
Google Ngram Viewer shows how "jackass" and "nincompoop" have occurred on timeline