Deficiency
Deficiency noun - A falling short of an essential or desirable amount or number.
Usage example: there is a deficiency of fresh food in the diet of many of the working poor
Need is a synonym for deficiency in necessity topic. In some cases you can use "Need" instead a noun "Deficiency", when it comes to topics like imperfection.
Need
Need noun - A state of being without something necessary, desirable, or useful.
Usage example: when it came time to wrap the presents, he found he was in need of adhesive tape
Deficiency is a synonym for need in emergency topic. You can use "Deficiency" instead a noun "Need".
Mutual synonyms
How words are described
Both words in one sentence
- By intending all along to eat the dogs, you need to bring along less supplies (but still, apparently, an excessive amount) and also provides extra insurance against scurvy (vitamin C deficiency).
Source: Crazy Prepared / Real Life
Cite this Source
Need and Deficiency. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deficiency/need
Deficiency & Need. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deficiency/need>.
Need or Deficiency. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deficiency/need.
Google Ngram Viewer shows how "deficiency" and "need" have occurred on timeline