Deficient and Faulty

Deficient

Deficient adjective - Falling short of a standard.
Usage example: woefully deficient eyesight kept him out of military service

Faulty is a synonym for deficient in defective topic. In some cases you can use "Faulty" instead an adjective "Deficient", when it comes to topics like unsatisfactory, imperfect. popular alternative

Nearby Words: deficiency, deficit, deficiently

Faulty

Faulty adjective - Having a fault.
Usage example: the cause of the plane crash was traced to faulty wiring

Deficient is a synonym for faulty in defective topic. You can use "Deficient" instead an adjective "Faulty", if it concerns topics such as unsatisfactory, incorrect. popular alternative

Cite this Source
Faulty and Deficient. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deficient/faulty
Deficient & Faulty. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deficient/faulty>.
Faulty or Deficient. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deficient/faulty.
Google Ngram Viewer shows how "deficient" and "faulty" have occurred on timeline