Conscientiousness and Heedlessness
Opposite meaning words
Conscientiousness
Conscientiousness noun - Strict attentiveness to what one is doing.
Usage example: finished the last details with as much conscientiousness as the first
Heedlessness is an antonym for conscientiousness.
Heedlessness
Heedlessness noun - Failure to take the care that a cautious person usually takes.
Conscientiousness is an antonym for heedlessness.
Cite this Source
Heedlessness and Conscientiousness. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/conscientiousness/heedlessness
Conscientiousness & Heedlessness. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/conscientiousness/heedlessness>.
Heedlessness or Conscientiousness. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/conscientiousness/heedlessness.
Google Ngram Viewer shows how "conscientiousness" and "heedlessness" have occurred on timeline