Implausible
Implausible adjective - Too extraordinary or improbable to believe.
Usage example: the terrorist attacks generated a whole passel of implausible conspiracy theories that dishonor the memory of those who perished
Preposterous is a synonym for implausible in outlandish topic. In some cases you can use "Preposterous" instead an adjective "Implausible", when it comes to topics like unimaginable, hard to believe.
Nearby Word: implausibly
Preposterous
Preposterous adjective - Conceived or made without regard for reason or reality.
Usage example: the idea that extraterrestrials built the pyramids is preposterous
Implausible is a synonym for preposterous in outlandish topic. You can use "Implausible" instead an adjective "Preposterous", if it concerns topics such as unimaginable.
Mutual synonyms
Related pairs
- extravagant and implausible
- extravagant and preposterous
- foolish and implausible
- foolish and preposterous
- irrational and implausible
- irrational and preposterous
- crazy and implausible
- crazy and preposterous
- incredible and implausible
- incredible and preposterous
- unbelievable and implausible
- unbelievable and preposterous
- fantastic and implausible
- fantastic and preposterous
Cite this Source
Preposterous and Implausible. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/implausible/preposterous
Implausible & Preposterous. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/implausible/preposterous>.
Preposterous or Implausible. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/implausible/preposterous.
Google Ngram Viewer shows how "implausible" and "preposterous" have occurred on timeline