Inconceivable and Indubitable
Opposite meaning words
Inconceivable
Inconceivable adjective - Too extraordinary or improbable to believe.
Usage example: the formerly inconceivable idea that humans could land on the moon
Indubitable is an antonym for inconceivable.
Nearby Word: inconceivability
Indubitable
Indubitable adjective - Not capable of being challenged or proved wrong.
Inconceivable is an antonym for indubitable.
Nearby Word: indubitably
Cite this Source
Indubitable and Inconceivable. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/inconceivable/indubitable
Inconceivable & Indubitable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/inconceivable/indubitable>.
Indubitable or Inconceivable. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/inconceivable/indubitable.
Google Ngram Viewer shows how "inconceivable" and "indubitable" have occurred on timeline