Inefficacious
Inefficacious adjective - Not producing the desired result.
Illogical and inefficacious are semantically related. In some cases you can use "Illogical" instead an adjective "Inefficacious".
Illogical
Illogical adjective - Not using or following good reasoning.
Inefficacious and illogical are semantically related. Sometimes you can use "Inefficacious" instead an adjective "Illogical".
Nearby Word: illogicality
Mutual synonyms
Cite this Source
Illogical and Inefficacious. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/inefficacious/illogical
Inefficacious & Illogical. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/inefficacious/illogical>.
Illogical or Inefficacious. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/inefficacious/illogical.
Google Ngram Viewer shows how "inefficacious" and "illogical" have occurred on timeline