Deficient and Impaired

Deficient

Deficient adjective - Lacking some necessary part.
Usage example: a diet deficient in calcium can lead to weak bones

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

Nearby Words: deficiency, deficit, deficiently

Impaired

Impaired adjective - Being under the influence of alcohol.

Deficient is a synonym for impaired. You can use "Deficient" instead an adjective "Impaired".

Nearby Words: impairment, impairing

Both words in one sentence

  • Film / The Crucible Politically Incorrect Villain: Park and the Lee twins, who routinely ridicule the hearing-impaired children in their care, and claim their physical disabilities cause them to be "mentally deficient" or "not like normal people".
Cite this Source
Impaired and Deficient. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deficient/impaired
Deficient & Impaired. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deficient/impaired>.
Impaired or Deficient. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deficient/impaired.
Google Ngram Viewer shows how "deficient" and "impaired" have occurred on timeline