Fallacious
Fallacious adjective - Not using or following good reasoning.
Usage example: it's fallacious to say that something must exist because science hasn't proven its nonexistence
Preposterous and fallacious are semantically related In some cases you can use "Preposterous" instead an adjective "Fallacious".
Preposterous
Preposterous adjective - Showing or marked by a lack of good sense or judgment.
Usage example: a preposterous suggestion to go swimming in this freezing weather
Fallacious and preposterous are semantically related in illogical topic. Sometimes you can use "Fallacious" instead an adjective "Preposterous".
Mutual synonyms
Related pairs
- stupid and fallacious
- stupid and preposterous
- inconsistent and fallacious
- inconsistent and preposterous
- irrational and fallacious
- irrational and preposterous
- invalid and fallacious
- invalid and preposterous
- illogical and fallacious
- illogical and preposterous
- unconvincing and fallacious
- unconvincing and preposterous
- unsound and fallacious
- unsound and preposterous
Cite this Source
Preposterous and Fallacious. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/fallacious/preposterous
Fallacious & Preposterous. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/fallacious/preposterous>.
Preposterous or Fallacious. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/fallacious/preposterous.
Google Ngram Viewer shows how "fallacious" and "preposterous" have occurred on timeline