Fallacious
Fallacious adjective - Not using or following good reasoning.
Lacking and fallacious are semantically related. In some cases you can use "Lacking" instead an adjective "Fallacious".
Lacking
Lacking adjective - Not coming up to an expected measure or meeting a particular need.
Fallacious and lacking are semantically related. Sometimes you can use "Fallacious" instead an adjective "Lacking".
Cite this Source
Lacking and Fallacious. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/fallacious/lacking
Fallacious & Lacking. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/fallacious/lacking>.
Lacking or Fallacious. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/fallacious/lacking.
Google Ngram Viewer shows how "fallacious" and "lacking" have occurred on timeline