Deficient
Deficient adjective - Lacking some necessary part.
Reasonable and deficient are semantically related. In some cases you can use "Reasonable" instead an adjective "Deficient".
Reasonable
Reasonable adjective - According to the rules of logic.
Deficient and reasonable are semantically related. Sometimes you can use "Deficient" instead an adjective "Reasonable".
Mutual synonyms
Both words in one sentence
- Having a mental or neurological condition does not, by itself, make someone insane, irrational, intellectually deficient, prone to violence, or in any way not a capable, reasonable adult.
Source: Disabled Means Helpless
Cite this Source
Reasonable and Deficient. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/deficient/reasonable
Deficient & Reasonable. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/deficient/reasonable>.
Reasonable or Deficient. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/deficient/reasonable.
Google Ngram Viewer shows how "deficient" and "reasonable" have occurred on timeline