Fallacious
Fallacious adjective - Not using or following good reasoning.
Thickheaded and fallacious are semantically related. In some cases you can use "Thickheaded" instead an adjective "Fallacious".
Thickheaded
Thickheaded adjective - Not having or showing an ability to absorb ideas readily.
Usage example: don't suppose that he's thickheaded just because he doesn't understand English very well
Fallacious and thickheaded are semantically related. Sometimes you can use "Fallacious" instead an adjective "Thickheaded".
Mutual synonyms
Cite this Source
Thickheaded and Fallacious. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/fallacious/thickheaded
Fallacious & Thickheaded. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/fallacious/thickheaded>.
Thickheaded or Fallacious. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/fallacious/thickheaded.
Google Ngram Viewer shows how "fallacious" and "thickheaded" have occurred on timeline