Ability
Ability noun - The physical or mental power to do something.
Usage example: as a result of the accident the once-vigorous athlete lost the ability to walk
Deficiency is an antonym for ability.
Nearby Word: able
Deficiency
Deficiency noun - A falling short of an essential or desirable amount or number.
Ability is an antonym for deficiency.
How words are described
Both words in one sentence
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Drama Queen: When Diva explains how she still got iron deficiency from doing a vegan diet rightwhich, in Real Life, tends to indicate a limited ability to process non-heme ironshe is dismissed as being overdramatic (and admonished by Brie for having not eaten enough iron-rich foods).
Source: Webcomic / Vegan Artbook
Cite this Source
Deficiency and Ability. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/ability/deficiency
Ability & Deficiency. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/ability/deficiency>.
Deficiency or Ability. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/ability/deficiency.
Google Ngram Viewer shows how "ability" and "deficiency" have occurred on timeline