Certain and Inconceivable

Certain

Certain adjective - Known but not named.

Inconceivable is an antonym for certain.

Nearby Words: certainty, certainly

Inconceivable

Inconceivable adjective - Too extraordinary or improbable to believe.
Usage example: the formerly inconceivable idea that humans could land on the moon

Certain is an antonym for inconceivable.

Nearby Word: inconceivability

Both words in one sentence

  • Pirate Parrot It's also worth noting that at a certain point of time pet parrots commanded huge prices in Europe, so it is not inconceivable for a sailor wanting to settle down to trade in several parrots as a retirement benefit of sorts, probably leaving one to himself — which is probably where it all started.
    Source: Pirate Parrot
Cite this Source
Inconceivable and Certain. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/certain/inconceivable
Certain & Inconceivable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/certain/inconceivable>.
Inconceivable or Certain. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/certain/inconceivable.
Google Ngram Viewer shows how "certain" and "inconceivable" have occurred on timeline